[michaelx386]

Bob Nystrom wrote a blog post[0] about self-publishing his book, Game Programming Patterns[1]. He used Kindle Direct Publishing and compares it against sales from CreateSpace, Smashwords and iBooks.

[0] http://journal.stuffwithstuff.com/2014/11/20/how-my-book-lau...

[1] http://gameprogrammingpatterns.com