Zeitgeisty Books Bundle
The Zeitgeisty Books Bundle is a collection of books about making things and being awesome while you do it. Featured writers include Robin Sloan, Disrupto's Jack Cheng, Minimal Mac's Patrick Rhone, Justin Sirois, game designer Ian Bogost, and Bryan Young.
The bundle is "pay what you want," but paying over $10 unlocks four additional books.
All of the books are DRM-free, and 10% of each sale goes to the Australian Literacy and Numeracy Foundation, which is super cool.