diff --git a/src/books.js b/src/books.js
index c8119bb..c376871 100644
--- a/src/books.js
+++ b/src/books.js
@@ -36,32 +36,75 @@
 //    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`;
 }
 
-
+// Example usage:
+console.log(getBookDetails(booksArray[3]));
+// Output: "The Art of Learning - Josh Waitzkin - 288 pages"
 
 // Iteration 3 | Delete Language
 // Your code here:
+booksArray.forEach((book) => {
+  delete book.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);
 
 // Bonus: Iteration 5 | Books Dictionary
 
@@ -69,32 +112,45 @@ 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() {
-  // Your code here:
-  
+function booksByAuthor(dictionary) {
+  let result = [];
+
+  for (const author in dictionary) {
+    const books = dictionary[author].map(([title, pages]) => ({
+      title,
+      pages,
+      author,
+    }));
+    result = [...result, ...books];
+  }
+
+  return result;
 }
-
-
+console.log(booksByAuthor(dictionary));
 
 // Bonus: Iteration 6 | Average Page Count
-function averagePageCount() {
-  // Your code here:
-  
+function averagePageCount(books) {
+  if (books.length === 0) return 0;
+
+  const totalPages = books.reduce((acc, book) => acc + book.pages, 0);
+  return totalPages / books.length;
 }
+
+// Example usage:
+console.log(averagePageCount(booksArray));