diff --git a/src/books.js b/src/books.js
index c8119bb..cd92d16 100644
--- a/src/books.js
+++ b/src/books.js
@@ -38,15 +38,53 @@
 
 
 // Your code here:
-const booksArray = [];
+const booksArray = [
+  {
+    title: "The Old Man and the Sea",
+    pages: 128,
+    author: "Ernest Hemingway",
+    details: {
+      language: "English",
+      description: "One of Hemingway's most famous works, it tells the story of Santiago...",
+    }
+  },
+  {
+    title: "The Airbnb Story",
+    pages: 256,
+    author: "Leigh Gallagher",
+    details: {
+      language: "English",
+      description: "This is the remarkable behind-the-scenes story of the creation and growth of Airbnb...",
+    }
+  },
+  {
+    title: "Educated - A Memoir",
+    pages: 352,
+    author: "Tara Westover",
+    details: {
+      language: "English",
+      description: "Educated is an account of the struggle for self-invention...",
+    }
+  },
+  {
+    title: "The Art of Learning",
+    pages: 288,
+    author: "Josh Waitzkin",
+    details: {
+      language: "English",
+      description: "The Art of Learning takes readers through Waitzkin's unique journey to excellence. He explains in clear detail how a well-thought-out, principled approach to learning is what separates success from failure.",
+    }
+  },
+];
 
 
 
 
 // Iteration 2 | Book Details
-function getBookDetails() {
+function getBookDetails(book) {
   // Your code here:
 
+  return `${book.title} - ${book.author} - ${book.pages} pages`;
 }
 
 
@@ -54,14 +92,20 @@ function getBookDetails() {
 // Iteration 3 | Delete Language
 // Your code here:
 
+for(let i = 0; i < booksArray.length; i++){
+  delete booksArray[i].details.language;
+}
 
+console.log(booksArray);
 
 
 // Iteration 4 | Estimated Reading Time
 // Your code here:
 
-
-
+for(let i = 0; i < booksArray.length; i++){
+  booksArray[i]["readingTime"] = Math.ceil((booksArray[i].pages * 500) / 90);
+}
+console.log(booksArray);
 
 // Bonus: Iteration 5 | Books Dictionary
 
@@ -86,15 +130,37 @@ const dictionary = {
     ],
 };
 
-function booksByAuthor() {
+function booksByAuthor(authorBooks) {
+
+  let arrayOfBooks = [];
+
   // Your code here:
-  
+  Object.entries(authorBooks).forEach(([authorKey, books]) => {
+    for(let book of books){
+      let newBook = {
+        title: book[0],
+        pages: book[1],
+        author: authorKey,
+      }
+
+      arrayOfBooks.push(newBook);
+    }
+  });
+
+  return arrayOfBooks;
 }
 
 
-
 // Bonus: Iteration 6 | Average Page Count
-function averagePageCount() {
+function averagePageCount(arrayOfBooks) {
   // Your code here:
+  let averagePageCount = 0;
+
+  for(let i = 0; i < arrayOfBooks.length; i++){
+    averagePageCount += arrayOfBooks[i].pages;
+  }
+
+  averagePageCount = Math.round(averagePageCount / arrayOfBooks.length); 
   
+  return averagePageCount;
 }