QR Code Book Description Pro Drupal 7 Development updates the most popular development reference for the release of Drupal 7. With several new and completely-rewritten essential APIs and improvements in Drupal 7, this book will not only teach developers how to write modules ranging from simple to complex, but also how Drupal itself works. This book is for existing Drupal module developers wanting to learn about Drupal 7 and people already knowledgeable in PHP who are interested in developing for Drupal. Simply put, if you are working with then you need this book
