diff --git a/src/books.js b/src/books.js
index c8119bb..ef311c4 100644
--- a/src/books.js
+++ b/src/books.js
@@ -1,67 +1,72 @@
 // 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`;
 }
 
-
-
 // Iteration 3 | Delete Language
 // Your code here:
-
-
-
+// for (const book in booksArray) {
+//   delete booksArray[book].details.language;
+// }
+booksArray.forEach((el) => {
+  delete el.details.language;
+});
+console.log(booksArray);
 
 // Iteration 4 | Estimated Reading Time
 // Your code here:
-
-
-
+booksArray.forEach((el) => {
+  const numberOfPages = el.pages;
+  const readingTimeInMinutes = Math.ceil((numberOfPages * 500) / 90);
+  el["readingTime"] = readingTimeInMinutes;
+});
+console.log(booksArray);
 
 // Bonus: Iteration 5 | Books Dictionary
 
@@ -69,32 +74,48 @@ function getBookDetails() {
  The book info is stored in arrays with structure: [title, pages]. 
 */
 const dictionary = {
-    "J. K. Rowling": [
-        ["Harry Potter and the Philosopher's Stone", 223],
-        ["Harry Potter and the Chamber of Secrets", 251],
-        ["Harry Potter and the Prisoner of Azkaban", 317],
-        ["Harry Potter and the Goblet of Fire", 636],
-    ],
-    "Neal Stephenson": [
-        ["Cryptonomicon", 928],
-        ["Anathem", 1008],
-        ["Fall; or, Dodge in Hell", 896],
-    ],
-    "Malcolm Gladwell": [
-        ["Outliers", 320],
-        ["Blink", 287],
-    ],
+  "J. K. Rowling": [
+    ["Harry Potter and the Philosopher's Stone", 223],
+    ["Harry Potter and the Chamber of Secrets", 251],
+    ["Harry Potter and the Prisoner of Azkaban", 317],
+    ["Harry Potter and the Goblet of Fire", 636],
+  ],
+  "Neal Stephenson": [
+    ["Cryptonomicon", 928],
+    ["Anathem", 1008],
+    ["Fall; or, Dodge in Hell", 896],
+  ],
+  "Malcolm Gladwell": [
+    ["Outliers", 320],
+    ["Blink", 287],
+  ],
 };
 
-function booksByAuthor() {
+function booksByAuthor(dictionary) {
   // Your code here:
-  
+  let result = [];
+  for (let key in dictionary) {
+    let bookArray = dictionary[key];
+    bookArray.forEach((el) => {
+      result.push({
+        author: key,
+        title: el[0],
+        pages: el[1],
+      });
+    });
+  }
+  return result;
 }
-
-
+console.log(booksByAuthor(dictionary));
 
 // Bonus: Iteration 6 | Average Page Count
-function averagePageCount() {
+function averagePageCount(booksArray) {
   // Your code here:
-  
+  let sumOfAllPages = 0;
+  let numberOfBooks = booksArray.length;
+  booksArray.forEach((el) => {
+    sumOfAllPages += el.pages;
+  });
+  return sumOfAllPages / numberOfBooks;
 }
+console.log(averagePageCount(booksArray));