The Big Silver Book of Russian Verbs: 555 Fully Conjugated Verbs --- I love this book!
Also, I would consider if you are getting a dictionary of any sort, get the big red one from Katzner.

I'm also looking in to some grammar books as well, and thinking of trying these out:

A Comprehensive Russian Grammar. 3rd Edition by Terence Wade, or
Modern Russian: An Advanced Grammar Course by Derek Offord.