"Beware of he who would deny you access to information, for in his heart he dreams himself your master."
-- Pravin Lal
by Mark Guzdial and Barbara Ericson, remixed by Jeffrey Elkner
Hands-on introductory computer programming using Python 3.
by Peter Wentworth, Jeffrey Elkner, Allen Downey, and Chris Meyers
An introductory computer science text book using Python.
by Tony R. Kuphaldt
A free series of textbooks on the subjects of electricity and electronics