I found the 3D Studio Max 'Bible' to be quite informative... one of those books that is fairly useful for the beginner as the tutorials are not too scary - but also quite handy for a more advanced user just as a reference tool. I think any book like that is the most useful, rather than go for a book that, say, develops a character from start to finish and just requires you to jump through hoops without knowing why
But I do also go with what Cam says here as the internet is very handy for information on 3D apps.
Good luck, and welcome