diff --git a/app.rb b/app.rb
index 0e00662..43f73f5 100644
--- a/app.rb
+++ b/app.rb
@@ -5,7 +5,7 @@
 require './classes/game'
 require './classes/source'
 require './classes/author'
- require './classes/movie'
+require './classes/movie'
 require './classes/source'
 
 class App
@@ -25,7 +25,7 @@ def list_all_books
     else
       @books.each do |book|
         puts "ID: #{book.id}, Author: #{book.author.first_name}, Publisher: #{book.publisher},
-        Cover state: #{book.cover_
+        Cover state: #{book.cover_state}"
       end
     end
   end
diff --git a/classes/author.rb b/classes/author.rb
index 8edd317..d4a9f9a 100644
--- a/classes/author.rb
+++ b/classes/author.rb
@@ -1,4 +1,4 @@
-require_relative 'item'
+require_relative './item'
 
 class Author
   attr_accessor :id, :first_name, :last_name, :items
diff --git a/classes/game.rb b/classes/game.rb
index dcfe7fd..8ac6853 100644
--- a/classes/game.rb
+++ b/classes/game.rb
@@ -1,5 +1,4 @@
-# game.rb
-require_relative 'item'
+require_relative './item'
 
 class Game < Item
   attr_accessor :multiplayer, :last_played_at
diff --git a/main.rb b/main.rb
index bd8206f..7f68f66 100644
--- a/main.rb
+++ b/main.rb
@@ -1,4 +1,4 @@
-require_relative 'app'
+require './app'
 
 class Menu
   def initialize(app)