My book, the Drupal 8 Development Cookbook, recently published! To celebrate this, and Drupal 8, Packt Publishing has a special sales campaign for learning about Drupal 8. If you are looking to learn how to use and develop with Drupal 8, use the coupon code DRUPAL850 (for eBooks only!) and click any of the following links:

Edit: There was some confusion on the coupon, discussed with Packt Publishing and the coupon is only good for eBooks.

Drupal 8 Development Cookbook

Over 60 hands-on recipes that get you acquainted with Drupal 8's features and help you harness its power

Drupal 8 Module Development

Create and design your own modules and websites from scratch with Drupal 8 with this book and ebook

Learning Drupal 8

Create complex websites quickly and easily using the building blocks of Drupal 8, the most powerful version of Drupal yet

Drupal 8 Configuration Management

Make the most of Drupal 8's coolest new feature—the Configuration Management system