diff --git a/src/books.js b/src/books.js
index c8119bb..cd896f9 100644
--- a/src/books.js
+++ b/src/books.js
@@ -36,65 +36,130 @@
 //    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 = [
+  (book1 = {
+    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...",
+    },
+  }),
+  (book2 = {
+    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...",
+    },
+  }),
+  (book3 = {
+    title: "Educated - A Memoir",
+    pages: 352,
+    author: "Tara Westover",
+    details: {
+      language: "English",
+      description:
+        "Educated is an account of the struggle for self-invention...",
+    },
+  }),
+  (book4 = {
+    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...",
+    },
+  }),
+];
 
 // Iteration 2 | Book Details
-function getBookDetails() {
+function getBookDetails(book) {
   // Your code here:
-
+  return `${book.title} - ${book.author} - ${book.pages} pages`;
 }
 
-
-
 // Iteration 3 | Delete Language
 // Your code here:
+for (let i = 0; i < booksArray.length; i++) {
 
-
-
+  delete booksArray[i].details.language;
+}
 
 // Iteration 4 | Estimated Reading Time
 // Your code here:
 
+const wordsPerPage = 500;
+const wordsPerMinute = 90;
 
-
+for (let i = 0; i < booksArray.length; i++) {
+  const book = booksArray[i];
+  const readingTime = (book.pages * wordsPerPage) / wordsPerMinute;
+  book.readingTime = Math.ceil(readingTime);
+}
 
 // Bonus: Iteration 5 | Books Dictionary
 
-/* The `dictionary` is an object containing books grouped by author. 
- 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:
-  
-}
+  const booksArray = [];
+  const authors = Object.keys(dictionary);
+
+  for (let i = 0; i < authors.length; i++) {
+    const author = authors[i];
+    const books = dictionary[author];
+
+    for (let j = 0; j < books.length; j++) {
+      const book = books[j];
 
+      const bookObject = {
+        title: book[0],
+        pages: book[1],
+        author: author,
+      };
 
+      booksArray.push(bookObject);
+    }
+  }
+
+  return booksArray;
+}
 
 // Bonus: Iteration 6 | Average Page Count
-function averagePageCount() {
-  // Your code here:
+function averagePageCount(books) {
+  let totalPages = 0;
   
-}
+  for (let i = 0; i < books.length; i++) {
+    totalPages += books[i].pages;
+  }
+  let average = totalPages / books.length;
+  
+  return average;
+}
\ No newline at end of file