If, like me, you appreciate a good English usage guide almost as much as a good novel, you’ll like this article from Harper’s Magazine.

The author recommends H.W. Fowler’s Modern English Usage. I’ve also enjoyed Bill Bryson’s Dictionary of Troublesome Words and The Mother Tongue, as well as Bill Walsh’s excellent Lapsing Into a Comma and The Elephants of Style.
For some reason, none of these books captured the public attention that was given to Lynne Truss’ Eats, Shoots & Leaves, though I think they’re all more technically accurate and satisfying for a real language curmudgeon.