Packt Publishing is worse than Apress. They basically take a subject, say Cocos2d-x, and publish a bunch of shitty books that cloud the book market with outdated information and bad code practices.

Packt and Appress ebooks are not even properly formatted for a programming subject (text alignment, code highlighting ...). Compare any Packt/Appress ebook with Pragmatic or LeanPub ebook formatting, the difference is staggering.