diff --git a/src/books.js b/src/books.js
index c8119bb..35d8e89 100644
--- a/src/books.js
+++ b/src/books.js
@@ -38,15 +38,51 @@
 
 
 // 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`
 }
 
 
@@ -54,13 +90,20 @@ function getBookDetails() {
 // Iteration 3 | Delete Language
 // Your code here:
 
+booksArray.forEach(function (element){
+  delete element.details.language
+})
+console.log(booksArray)
 
 
 
 // Iteration 4 | Estimated Reading Time
 // Your code here:
 
-
+booksArray.forEach(function(element){
+  element.readingTime = Math.ceil((element.pages * 500) / 90)
+})
+console.log(booksArray)
 
 
 // Bonus: Iteration 5 | Books Dictionary
@@ -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 +129,27 @@ const dictionary = {
     ],
 };
 
-function booksByAuthor() {
-  // Your code here:
-  
+function booksByAuthor(dictionary) {
+  const resultArr = []
+  for (const author in dictionary){
+    dictionary[author].forEach(function (book){
+      resultArr.push({title: book[0],
+        pages: book[1],
+        author: author,
+      },)
+    })
+  }
+  return resultArr
 }
-
+console.log(booksByAuthor(dictionaryExample))
 
 
 // Bonus: Iteration 6 | Average Page Count
-function averagePageCount() {
-  // Your code here:
-  
+function averagePageCount(booksArr) {
+  let pageCount = 0
+  booksArr.forEach(function(book){
+    pageCount += book.pages
+  })
+  return pageCount/booksArr.length
 }
+console.log(averagePageCount(booksArray))
\ No newline at end of file