here is what i have, and they have helped me pretty good.
Fast Track's Bass 1-Hal Leonard*
Funk Bass-Hal Leonard*
The Art of Walkin Bass-Hal Leonard
Rage Against the Machine Bass Collection-Hal Leonard
Red Hot Chili Pepper's Californiacation and Blood Sugar Sex Magic-Hal Leonard*
these books are pretty different styles of playing, but that just increases what you can do with bass. i bought all these for $15. i recommed them, the ones with the * are the ones i recommend highly.