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Richard L. Leed, Slava Paperno, Slavica, 1987, 322 pages
For people who want to check their flexions (declensions) or those who want to learn grammatical cases by inference, 5000 Russian Words : With All Their Inflected Forms is a must : it contains all the forms of nouns (Genitive plural, dative singular, etc...) of the 5000 most common words in Russian.

Although the book is by its very nature repetitive, I find it quite useful to see examples of declensions and then try to infer the rules, rather than derive the declension from the rules.

This is not the first book you should get but once you have a few books about Russian think of it, if only as a reference.