i've definitely seen this book when i was working at borders!
thank you so much.
Also the little book: The Elements of Style by William Strunk, rev. by E.B. White. If you're looking for more of a brush-up than a from-scratch tutorial, you can't do better (or cheaper; it really is a tiny li'l thing).
And Eats, Shoots, and Leaves for sure.
i actually think i may have that book at home. i'll have to check later.