Nickel & Dime Pitches, published by the Society for American Baseball Research

Summary: a variety of articles on various baseball subjects, covering history, random statistics, mechanics, among other things.

Comments: all kinds of interesting stuff! It was interesting seeing what kinds of statistics they came up with and learning more about various aspects of baseball history (the advent of free agency, for example).

The Physics of Baseball, by Robert K. Adair

Summary: The book describes how natural laws affect various aspects of baseball: how a spinning ball follows a different path than a non-spinning ball, how the weight of the bat affects the distance a ball can be hit, etc.

Comments: It's a interesting topic, but kind of a dense book. I wouldn't recommend reading it unless you are actually interested in the subject.

The Hidden Language of Baseball, by Paul Dickson

A history of signs and sign-stealing in baseball. Quite interesting. I didn't realize there was so much going on "behind the scenes". Maybe I should try to look for such things next time I'm at a game.