"When did the copyright holders become the Corporations? Who owns the Intellectual Property? Who controls our Arts and Sciences? They are slowly eroding our rights. The authors, scientists, researchers, students and you are very much at risk."
by Jeffrey Elkner (with liberal borrowings from the work of Allen Downey,
and Peter Wentworth
An introductory computer programming text book 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