Steven King's "On Writing" is my favorite book on writing. It's mostly autobiographical, but even that shows information about writing. My favorite quote is, "Once you've had a 200 pound babysitter hold you down and fart in your face, a New York Times critic holds no fear."
I wish Joss Whedon would write a book about writing. Except for the way he handles love stories, I love the way he sets up story arcs. I've tried studying it, but all I can remember is the double reverse. (That's where the Big Bad at the start isn't the same person as the Big Bad at the end. And yes, you can guarantee that I'll be using the double reverse in just about everything I write.)
I'd also love Dean Koontz to write a book about writing. I love the way he mixes horror, hope, and humor. My favorite of his books also cause you to feel pity for the Big Bad. (I'm trying for that, too.)
So guys, get going and write those books!