diff --git a/apps/angular/66-functional-auth-guard/.eslintrc.json b/apps/angular/66-functional-auth-guard/.eslintrc.json
new file mode 100644
index 000000000..8ebcbfd59
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/.eslintrc.json
@@ -0,0 +1,36 @@
+{
+  "extends": ["../../../.eslintrc.json"],
+  "ignorePatterns": ["!**/*"],
+  "overrides": [
+    {
+      "files": ["*.ts"],
+      "extends": [
+        "plugin:@nx/angular",
+        "plugin:@angular-eslint/template/process-inline-templates"
+      ],
+      "rules": {
+        "@angular-eslint/directive-selector": [
+          "error",
+          {
+            "type": "attribute",
+            "prefix": "app",
+            "style": "camelCase"
+          }
+        ],
+        "@angular-eslint/component-selector": [
+          "error",
+          {
+            "type": "element",
+            "prefix": "app",
+            "style": "kebab-case"
+          }
+        ]
+      }
+    },
+    {
+      "files": ["*.html"],
+      "extends": ["plugin:@nx/angular-template"],
+      "rules": {}
+    }
+  ]
+}
diff --git a/apps/angular/66-functional-auth-guard/README.md b/apps/angular/66-functional-auth-guard/README.md
new file mode 100644
index 000000000..247e3e054
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/README.md
@@ -0,0 +1,13 @@
+# functional-auth-guard
+
+> author: thomas-laforge
+
+### Run Application
+
+```bash
+npx nx serve angular-functional-auth-guard
+```
+
+### Documentation and Instruction
+
+Challenge documentation is [here](https://angular-challenges.vercel.app/challenges/angular/66-functional-auth-guard/).
diff --git a/apps/angular/66-functional-auth-guard/project.json b/apps/angular/66-functional-auth-guard/project.json
new file mode 100644
index 000000000..d4c024a74
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/project.json
@@ -0,0 +1,87 @@
+{
+  "name": "angular-functional-auth-guard",
+  "$schema": "../../../node_modules/nx/schemas/project-schema.json",
+  "projectType": "application",
+  "prefix": "app",
+  "sourceRoot": "apps/angular/66-functional-auth-guard/src",
+  "tags": [],
+  "targets": {
+    "build": {
+      "executor": "@angular/build:application",
+      "outputs": ["{options.outputPath}"],
+      "options": {
+        "outputPath": "dist/apps/angular/66-functional-auth-guard",
+        "browser": "apps/angular/66-functional-auth-guard/src/main.ts",
+        "tsConfig": "apps/angular/66-functional-auth-guard/tsconfig.app.json",
+        "inlineStyleLanguage": "scss",
+        "assets": [
+          {
+            "glob": "**/*",
+            "input": "apps/angular/66-functional-auth-guard/public"
+          }
+        ],
+        "styles": ["apps/angular/66-functional-auth-guard/src/styles.scss"]
+      },
+      "configurations": {
+        "production": {
+          "budgets": [
+            {
+              "type": "initial",
+              "maximumWarning": "500kb",
+              "maximumError": "1mb"
+            },
+            {
+              "type": "anyComponentStyle",
+              "maximumWarning": "4kb",
+              "maximumError": "8kb"
+            }
+          ],
+          "outputHashing": "all"
+        },
+        "development": {
+          "optimization": false,
+          "extractLicenses": false,
+          "sourceMap": true
+        }
+      },
+      "defaultConfiguration": "production"
+    },
+    "serve": {
+      "continuous": true,
+      "executor": "@angular/build:dev-server",
+      "configurations": {
+        "production": {
+          "buildTarget": "angular-functional-auth-guard:build:production"
+        },
+        "development": {
+          "buildTarget": "angular-functional-auth-guard:build:development"
+        }
+      },
+      "defaultConfiguration": "development"
+    },
+    "extract-i18n": {
+      "executor": "@angular/build:extract-i18n",
+      "options": {
+        "buildTarget": "angular-functional-auth-guard:build"
+      }
+    },
+    "lint": {
+      "executor": "@nx/eslint:lint"
+    },
+    "test": {
+      "executor": "@angular/build:unit-test",
+      "options": {
+        "runnerConfig": "apps/angular/66-functional-auth-guard/vitest-base.config.ts"
+      }
+    },
+    "serve-static": {
+      "continuous": true,
+      "executor": "@nx/web:file-server",
+      "options": {
+        "buildTarget": "angular-functional-auth-guard:build",
+        "staticFilePath": "dist/apps/angular/66-functional-auth-guard/browser",
+        "spa": true
+      }
+    }
+  }
+}
diff --git a/apps/angular/66-functional-auth-guard/public/favicon.ico b/apps/angular/66-functional-auth-guard/public/favicon.ico
new file mode 100644
index 000000000..317ebcb23
Binary files /dev/null and b/apps/angular/66-functional-auth-guard/public/favicon.ico differ
diff --git a/apps/angular/66-functional-auth-guard/src/app/admin.component.ts b/apps/angular/66-functional-auth-guard/src/app/admin.component.ts
new file mode 100644
index 000000000..e44150aea
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/app/admin.component.ts
@@ -0,0 +1,15 @@
+import { ChangeDetectionStrategy, Component } from '@angular/core';
+import { RouterLink } from '@angular/router';
+
+@Component({
+  selector: 'app-admin',
+  template: `
+    <div class="flex min-h-screen flex-col items-center justify-center gap-4 p-8">
+      <h1 class="text-3xl font-bold">Admin</h1>
+      <a class="text-blue-600 underline" routerLink="/">Back to Home</a>
+    </div>
+  `,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  imports: [RouterLink],
+})
+export class AdminComponent {}
diff --git a/apps/angular/66-functional-auth-guard/src/app/admin.guard.ts b/apps/angular/66-functional-auth-guard/src/app/admin.guard.ts
new file mode 100644
index 000000000..6bbfbd2d1
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/app/admin.guard.ts
@@ -0,0 +1,10 @@
+import { inject } from '@angular/core';
+import { CanActivateFn, Router } from '@angular/router';
+import { AuthService } from './auth.service';
+
+export const adminGuard: CanActivateFn = () => {
+  const authService = inject(AuthService);
+  const router = inject(Router);
+
+  return authService.isAdmin() || router.createUrlTree(['/']);
+};
diff --git a/apps/angular/66-functional-auth-guard/src/app/app.component.spec.ts b/apps/angular/66-functional-auth-guard/src/app/app.component.spec.ts
new file mode 100644
index 000000000..4b8632966
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/app/app.component.spec.ts
@@ -0,0 +1,54 @@
+import { TestBed } from '@angular/core/testing';
+import { Router, provideRouter } from '@angular/router';
+import { AppComponent } from './app.component';
+import { AuthService } from './auth.service';
+import { routes } from './app.routes';
+
+describe('Functional Auth Guards', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [provideRouter(routes)],
+    });
+    TestBed.createComponent(AppComponent);
+  });
+
+  describe('authGuard', () => {
+    it('should redirect to / when not logged in', async () => {
+      const router = TestBed.inject(Router);
+      await router.navigate(['/dashboard']);
+      expect(router.url).toBe('/');
+    });
+
+    it('should allow navigation when logged in', async () => {
+      const authService = TestBed.inject(AuthService);
+      const router = TestBed.inject(Router);
+      authService.login('user');
+      await router.navigate(['/dashboard']);
+      expect(router.url).toBe('/dashboard');
+    });
+  });
+
+  describe('adminGuard', () => {
+    it('should redirect to / when not logged in', async () => {
+      const router = TestBed.inject(Router);
+      await router.navigate(['/admin']);
+      expect(router.url).toBe('/');
+    });
+
+    it('should redirect to / when logged in as user', async () => {
+      const authService = TestBed.inject(AuthService);
+      const router = TestBed.inject(Router);
+      authService.login('user');
+      await router.navigate(['/admin']);
+      expect(router.url).toBe('/');
+    });
+
+    it('should allow navigation when logged in as admin', async () => {
+      const authService = TestBed.inject(AuthService);
+      const router = TestBed.inject(Router);
+      authService.login('admin');
+      await router.navigate(['/admin']);
+      expect(router.url).toBe('/admin');
+    });
+  });
+});
diff --git a/apps/angular/66-functional-auth-guard/src/app/app.component.ts b/apps/angular/66-functional-auth-guard/src/app/app.component.ts
new file mode 100644
index 000000000..6f48a095f
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/app/app.component.ts
@@ -0,0 +1,10 @@
+import { ChangeDetectionStrategy, Component } from '@angular/core';
+import { RouterOutlet } from '@angular/router';
+
+@Component({
+  selector: 'app-root',
+  template: `<router-outlet />`,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  imports: [RouterOutlet],
+})
+export class AppComponent {}
diff --git a/apps/angular/66-functional-auth-guard/src/app/app.config.ts b/apps/angular/66-functional-auth-guard/src/app/app.config.ts
new file mode 100644
index 000000000..414eeaeb8
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/app/app.config.ts
@@ -0,0 +1,16 @@
+import {
+  ApplicationConfig,
+  provideBrowserGlobalErrorListeners,
+  provideZoneChangeDetection,
+} from '@angular/core';
+import { provideRouter } from '@angular/router';
+
+import { routes } from './app.routes';
+
+export const appConfig: ApplicationConfig = {
+  providers: [
+    provideBrowserGlobalErrorListeners(),
+    provideZoneChangeDetection({ eventCoalescing: true }),
+    provideRouter(routes),
+  ],
+};
diff --git a/apps/angular/66-functional-auth-guard/src/app/app.routes.ts b/apps/angular/66-functional-auth-guard/src/app/app.routes.ts
new file mode 100644
index 000000000..0a43617e9
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/app/app.routes.ts
@@ -0,0 +1,12 @@
+import { Routes } from '@angular/router';
+import { adminGuard } from './admin.guard';
+import { AdminComponent } from './admin.component';
+import { authGuard } from './auth.guard';
+import { DashboardComponent } from './dashboard.component';
+import { HomeComponent } from './home.component';
+
+export const routes: Routes = [
+  { path: '', component: HomeComponent },
+  { path: 'dashboard', component: DashboardComponent, canActivate: [authGuard] },
+  { path: 'admin', component: AdminComponent, canActivate: [authGuard, adminGuard] },
+];
diff --git a/apps/angular/66-functional-auth-guard/src/app/auth.guard.ts b/apps/angular/66-functional-auth-guard/src/app/auth.guard.ts
new file mode 100644
index 000000000..abb444031
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/app/auth.guard.ts
@@ -0,0 +1,10 @@
+import { inject } from '@angular/core';
+import { CanActivateFn, Router } from '@angular/router';
+import { AuthService } from './auth.service';
+
+export const authGuard: CanActivateFn = () => {
+  const authService = inject(AuthService);
+  const router = inject(Router);
+
+  return authService.isLoggedIn() || router.createUrlTree(['/']);
+};
diff --git a/apps/angular/66-functional-auth-guard/src/app/auth.service.ts b/apps/angular/66-functional-auth-guard/src/app/auth.service.ts
new file mode 100644
index 000000000..012ffb44c
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/app/auth.service.ts
@@ -0,0 +1,21 @@
+import { computed, Injectable, signal } from '@angular/core';
+
+@Injectable({ providedIn: 'root' })
+export class AuthService {
+  private readonly _isLoggedIn = signal(false);
+  private readonly _role = signal<'user' | 'admin'>('user');
+
+  readonly isLoggedIn = this._isLoggedIn.asReadonly();
+  readonly role = this._role.asReadonly();
+  readonly isAdmin = computed(() => this._isLoggedIn() && this._role() === 'admin');
+
+  login(role: 'user' | 'admin'): void {
+    this._isLoggedIn.set(true);
+    this._role.set(role);
+  }
+
+  logout(): void {
+    this._isLoggedIn.set(false);
+    this._role.set('user');
+  }
+}
diff --git a/apps/angular/66-functional-auth-guard/src/app/dashboard.component.ts b/apps/angular/66-functional-auth-guard/src/app/dashboard.component.ts
new file mode 100644
index 000000000..bf5db8a90
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/app/dashboard.component.ts
@@ -0,0 +1,15 @@
+import { ChangeDetectionStrategy, Component } from '@angular/core';
+import { RouterLink } from '@angular/router';
+
+@Component({
+  selector: 'app-dashboard',
+  template: `
+    <div class="flex min-h-screen flex-col items-center justify-center gap-4 p-8">
+      <h1 class="text-3xl font-bold">Dashboard</h1>
+      <a class="text-blue-600 underline" routerLink="/">Back to Home</a>
+    </div>
+  `,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  imports: [RouterLink],
+})
+export class DashboardComponent {}
diff --git a/apps/angular/66-functional-auth-guard/src/app/home.component.ts b/apps/angular/66-functional-auth-guard/src/app/home.component.ts
new file mode 100644
index 000000000..5b56ed2f4
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/app/home.component.ts
@@ -0,0 +1,47 @@
+import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
+import { RouterLink } from '@angular/router';
+import { AuthService } from './auth.service';
+
+@Component({
+  selector: 'app-home',
+  template: `
+    <div class="flex min-h-screen flex-col items-center justify-center gap-6 p-8">
+      <h1 class="text-3xl font-bold">Home</h1>
+
+      <p class="text-gray-600">
+        Status:
+        <span class="font-semibold">
+          {{ authService.isLoggedIn() ? 'Logged in as ' + authService.role() : 'Not logged in' }}
+        </span>
+      </p>
+
+      <div class="flex gap-3">
+        <button
+          class="rounded bg-blue-600 px-4 py-2 text-white hover:bg-blue-700"
+          (click)="authService.login('user')">
+          Login as User
+        </button>
+        <button
+          class="rounded bg-purple-600 px-4 py-2 text-white hover:bg-purple-700"
+          (click)="authService.login('admin')">
+          Login as Admin
+        </button>
+        <button
+          class="rounded bg-gray-300 px-4 py-2 text-gray-800 hover:bg-gray-400"
+          (click)="authService.logout()">
+          Logout
+        </button>
+      </div>
+
+      <div class="flex gap-4">
+        <a class="text-blue-600 underline" routerLink="/dashboard">Go to Dashboard</a>
+        <a class="text-blue-600 underline" routerLink="/admin">Go to Admin</a>
+      </div>
+    </div>
+  `,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  imports: [RouterLink],
+})
+export class HomeComponent {
+  protected authService = inject(AuthService);
+}
diff --git a/apps/angular/66-functional-auth-guard/src/index.html b/apps/angular/66-functional-auth-guard/src/index.html
new file mode 100644
index 000000000..592c9264b
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/index.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>angular-functional-auth-guard</title>
+    <base href="/" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="icon" type="image/x-icon" href="favicon.ico" />
+  </head>
+  <body>
+    <app-root></app-root>
+  </body>
+</html>
diff --git a/apps/angular/66-functional-auth-guard/src/main.ts b/apps/angular/66-functional-auth-guard/src/main.ts
new file mode 100644
index 000000000..7205a13df
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/main.ts
@@ -0,0 +1,5 @@
+import { bootstrapApplication } from '@angular/platform-browser';
+import { AppComponent } from './app/app.component';
+import { appConfig } from './app/app.config';
+
+bootstrapApplication(AppComponent, appConfig).catch((err) => console.error(err));
diff --git a/apps/angular/66-functional-auth-guard/src/styles.scss b/apps/angular/66-functional-auth-guard/src/styles.scss
new file mode 100644
index 000000000..b5c61c956
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/styles.scss
@@ -0,0 +1,3 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
diff --git a/apps/angular/66-functional-auth-guard/src/test-setup/no-teardown.ts b/apps/angular/66-functional-auth-guard/src/test-setup/no-teardown.ts
new file mode 100644
index 000000000..655736368
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/src/test-setup/no-teardown.ts
@@ -0,0 +1,25 @@
+import { getTestBed } from '@angular/core/testing';
+import {
+  BrowserTestingModule,
+  platformBrowserTesting,
+} from '@angular/platform-browser/testing';
+import { beforeEach } from 'vitest';
+
+/**
+ * @see https://github.com/angular/angular-cli/issues/31733
+ */
+const symbol = Symbol.for('@angular-challenge/testbed-setup');
+const g = globalThis as unknown as { [symbol]: boolean };
+
+if (!g[symbol]) {
+  g[symbol] = true;
+
+  getTestBed().resetTestEnvironment();
+  getTestBed().initTestEnvironment(
+    BrowserTestingModule,
+    platformBrowserTesting(),
+    { teardown: { destroyAfterEach: false } },
+  );
+}
+
+beforeEach(() => getTestBed().resetTestingModule());
diff --git a/apps/angular/66-functional-auth-guard/tailwind.config.js b/apps/angular/66-functional-auth-guard/tailwind.config.js
new file mode 100644
index 000000000..38183db2c
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/tailwind.config.js
@@ -0,0 +1,14 @@
+const { createGlobPatternsForDependencies } = require('@nx/angular/tailwind');
+const { join } = require('path');
+
+/** @type {import('tailwindcss').Config} */
+module.exports = {
+  content: [
+    join(__dirname, 'src/**/!(*.stories|*.spec).{ts,html}'),
+    ...createGlobPatternsForDependencies(__dirname),
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+};
diff --git a/apps/angular/66-functional-auth-guard/tsconfig.app.json b/apps/angular/66-functional-auth-guard/tsconfig.app.json
new file mode 100644
index 000000000..5d5af52c7
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/tsconfig.app.json
@@ -0,0 +1,14 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../../dist/out-tsc",
+    "types": []
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": [
+    "jest.config.ts",
+    "src/test-setup.ts",
+    "src/**/*.test.ts",
+    "src/**/*.spec.ts"
+  ]
+}
diff --git a/apps/angular/66-functional-auth-guard/tsconfig.json b/apps/angular/66-functional-auth-guard/tsconfig.json
new file mode 100644
index 000000000..1ae47abeb
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/tsconfig.json
@@ -0,0 +1,33 @@
+{
+  "extends": "../../../tsconfig.base.json",
+  "compilerOptions": {
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "target": "es2022",
+    "moduleResolution": "bundler",
+    "isolatedModules": true,
+    "emitDecoratorMetadata": false,
+    "module": "preserve",
+    "lib": ["dom", "es2022"]
+  },
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "typeCheckHostBindings": true,
+    "strictTemplates": true
+  },
+  "files": [],
+  "include": [],
+  "references": [
+    {
+      "path": "./tsconfig.app.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ]
+}
diff --git a/apps/angular/66-functional-auth-guard/tsconfig.spec.json b/apps/angular/66-functional-auth-guard/tsconfig.spec.json
new file mode 100644
index 000000000..55718726e
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/tsconfig.spec.json
@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../../dist/out-tsc",
+    "types": ["vitest/globals"]
+  },
+  "include": ["src/**/*.ts", "src/**/*.d.ts"]
+}
diff --git a/apps/angular/66-functional-auth-guard/vitest-base.config.ts b/apps/angular/66-functional-auth-guard/vitest-base.config.ts
new file mode 100644
index 000000000..d5747f9a9
--- /dev/null
+++ b/apps/angular/66-functional-auth-guard/vitest-base.config.ts
@@ -0,0 +1,20 @@
+import { playwright } from '@vitest/browser-playwright';
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    setupFiles: [
+      'apps/angular/66-functional-auth-guard/src/test-setup/no-teardown.ts',
+    ],
+    testTimeout: 3_000,
+    browser: {
+      enabled: true,
+      provider: playwright({
+        launchOptions: {
+          args: ['--remote-debugging-port=9222'],
+        },
+      }),
+      instances: [{ browser: 'chromium' }],
+    },
+  },
+});
diff --git a/challenge-number.json b/challenge-number.json
index c828ee7e3..f8ba4a130 100644
--- a/challenge-number.json
+++ b/challenge-number.json
@@ -1,6 +1,6 @@
 {
-  "total": 62,
-  "🟢": 25,
+  "total": 63,
+  "🟢": 26,
   "🟠": 124,
   "🔴": 212
 }