new-5.js

const goodreadsInfo = {
  currentlyReading: [
    { title: "The Hobbit", author: "J.R.R. Tolkien" },
    { title: "The Two Towers", author: "J.R.R. Tolkien" }
  ],

  wantToRead: [
    { title: "The Art of Language Invention", author: "David Peterson" },
    { title: "Looking for Alaska", author: "John Green" }
  ]
};
const addNewBooks = (books, additionalBookObjects = []) => {
 return [...books, ...additionalBookObjects];
}
goodreadsInfo.currentlyReading = addNewBooks(goodreadsInfo.currentlyReading, [{ title: "The MOM Test", author: "Rob Fitzpatrick" }]);

const showGoodreadsInfo = (info) => {
    console.log("Currently Reading:");
    for (let x of info.currentlyReading) {
       console.log(`${x.title} by ${x.author}`);
    }
    console.log();
    console.log("Want to Read:");
    for (let x of info.wantToRead) {
       console.log(`${x.title} by ${x.author}`);
    }
}
showGoodreadsInfo(goodreadsInfo);