Having read -all- the books as a kid, I was totally disappointed with the first one, never heard of a second one, and doubt the third one will be close to the books.

If you have the chance, pick up the book Starship Troopers, read a bit of it, and try to figure out how it's even remotely similar to the movie. The books themselves, other then being amazingly cool (especially when your 10), also touch on a decent amount of social philosophy, which while not completely ripped out, were pretty much white washed for the movie.