diff --git a/main.js b/main.js
index 220d2e1..835bbbe 100644
--- a/main.js
+++ b/main.js
@@ -1 +1,54 @@
-// write your code here to make the tests pass
+const Library = function() {
+  let books = [];
+  let addBook = function(bookToAdd) {
+    books.push(bookToAdd)
+  }
+
+  let checkOutBook = function(bookCheckOut) {
+    let foundBook = books.some((book) => {
+      return book.getAttribute('title') == bookCheckOut.getAttribute('title')
+    })
+
+    if(foundBook) {
+      bookCheckOut.setAttribute('checkedOut', true)
+    };
+  }
+
+  let returnBook = function(bookToReturn) {
+    let foundBook = books.some((book) => {
+      return book.getAttribute('title') == bookToReturn.getAttribute('title')
+    })
+    if(foundBook) {
+      bookToReturn.setAttribute('checkedOut', false)
+    };
+  }
+
+  return {
+    addBook: addBook,
+    checkOutBook: checkOutBook,
+    returnBook: returnBook
+  }
+}
+
+const Book = function(bookTitle, author) {
+  let attributes = {
+  checkedOut: false,
+  title: bookTitle,
+  author: author
+  }
+
+  let getAttribute = function(attributeName) {
+    return attributes[attributeName];
+  }
+
+  let setAttribute = function(attributeName, value){
+    //console.log(attributeName, value)
+    if (attributes[attributeName] != undefined) {
+      attributes[attributeName] = value;
+    }
+  }
+  return {
+    getAttribute: getAttribute,
+    setAttribute: setAttribute
+  }
+}