Guess what! There’s a good number of books on paintball. A lot of them are at your local library. Currently Omaha Public Library has a good number of em, so check them out! Here’s a list from the OPL catalog:
Here’s the complete listing of books and articles. There’s a few fiction, but The Complete Guide to Paintball, at least when I read it back in 1999 or so, was pretty good stuff.