I seem to post lots of links to free books. i will continue this trend. Keeping with this semester’s theme of algebraic logic (more posts on this coming!) I came across Burris and Sankappanavar’s A Course in Universal Algebra, which is a graduate algebra book. This is more algebra than logic I suppose. I glanced at it but I don’t know how accessible it is without background. It has a section on connections to model theory and what looks like a lot of exercises dealing with lattices. Lattices are neat.

Also, there is a free copy Diestel’s Graph Theory online. Graphs are neat.

Actually, John Baez has links to several online math and physics texts on this page. Some of them seem somewhat removed from my current interests, but it is nice to know there they are out there.

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