Today through next Tuesday, all three of my books are on sale for 40% off, with the code turkeysale2015:

• Rails, Angular, Postgres, Bootstrap: Powerful, Effective, Efficient Full-stack Web Development ($14.40 for the beta ebook!)
• The Senior Software Engineer: 11 Practices of an Effective Technical Leader ($15!)
• Build Awesome Command-Line Applications with Ruby 2 ($13.20 for the ebook!)

Just use code turkeysale2015 at checkout to get 40% off!