diff --git a/src/books.js b/src/books.js
index c8119bb..bac885d 100644
--- a/src/books.js
+++ b/src/books.js
@@ -1,65 +1,108 @@
 // Iteration 1 | Books Array
 
-// Book 1
-// 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...
-// }
-
-// Book 2
-// title: The Airbnb Story
-// pages: 256
-// author: Leight Gallagher
-// details: {
-//    language: English
-//    description: This is the remarkable behind-the-scenes story of the creation and growth of Airbnb...
-// }
-
-// Book 3
-// title: Educated - A Memoir
-// pages: 352
-// author: Tara Westover
-// details: {
-//    language: English
-//    description: Educated is an account of the struggle for self-invention...
-// }
-
-// Book 4
-// 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.
-// }
+
 
 
 // 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: "Leight 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() {
-  // Your code here:
 
+
+function getBookDetails(book) {
+  return book.title + " - " + book.author + " - " + book.pages + " pages";
 }
 
 
+const book = {
+  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."
+  }
+};
+
+console.log(getBookDetails(book))
+
+
 
 // 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:
 
+booksArray.forEach((book) => {
+ book.readingTime = Math.ceil((book.pages * 500)/90);
+ 
+});
+
+console.log(booksArray)
 
 
 
@@ -68,7 +111,7 @@ function getBookDetails() {
 /* The `dictionary` is an object containing books grouped by author. 
  The book info is stored in arrays with structure: [title, pages]. 
 */
-const dictionary = {
+const dictionaryExample  = {
     "J. K. Rowling": [
         ["Harry Potter and the Philosopher's Stone", 223],
         ["Harry Potter and the Chamber of Secrets", 251],
@@ -86,15 +129,48 @@ const dictionary = {
     ],
 };
 
-function booksByAuthor() {
-  // Your code here:
-  
+
+function booksByAuthor(dictionary ) {
+  const booksArray = [];
+// console.log(dictionary)
+  for (let author in dictionary) {
+    dictionary [author].forEach(book => {
+      const [title, pages] = book;  
+
+      booksArray.push({
+        title: title,
+        pages: pages,
+        author: author
+      });
+    });
+  }
+// console.log(booksArray)
+  return booksArray;
 }
 
+console.log(booksByAuthor(dictionaryExample ));
+
+
+
 
 
 // Bonus: Iteration 6 | Average Page Count
-function averagePageCount() {
-  // Your code here:
-  
+function averagePageCount(books) {
+  if (!Array.isArray(books) || books.length === 0) {
+    return 0;
+  }
+
+  let totalPages = 0;
+
+  books.forEach(book => {
+    totalPages += book.pages;
+  });
+
+  return totalPages / books.length;
 }
+
+
+
+
+console.log(averagePageCount(booksArray));  
+