Textbook Revolution is a resource on free textbooks and free related course materials. In general, I must say the prices of textbooks seem crazy. This is another tool great open access resource.
Some examples: The Scientist and Engineer’s Guide to Digital Signal Processing by Steven W. Smith; Light and Matter by Benjamin Crowell; A First Course in Linear Algebra by Robert A Beeze; Programming Ruby: The Pragmatic Programmer’s Guide by
Dave Thomas and Introduction to Statistical Thought by Michael Lavine.
While on the subject of textbooks, I will plug my father’s book: Statistics for Experimenters – it is my blog so I get to do what I want 🙂
Related: Open Access Education Materials – Open Access Engineering Journals – Science and Engineering Webcast Libraries

Pingback: Curious Cat Science and Engineering Blog » All About Circuits