Dont know about this book, but if the reviews arn't great maybe steer clear.
What do you need the book for? a general maya book, FX, modelling?

3D is a massive topic so getting a book that covers it all very well doesn't really happen.

Have you considered video guides instead, its allot better to see someone going through the steps sometimes. That along side maya help (which is actually pretty damn good) might be enough.