Dorky Poll: Favorite Math Book

I had a doctor visit and a meeting schduled for this morning, which cut into my blogging time. And I have another meeting in an hour, and I need to get lunch. This sounds like a job for a Dorky Poll!

So here’s a quick pair of questions, based on a glance at my office shelves:

What’s your favorite math book? What’s your least favorite?

I ask this because looking at my bookshelves reveals that I have a number of books about math, and I don’t really like any of them. My least favorite is easy: Arfken’s Mathematical Methods for Physicists— it’s so completely useless that I’m not sure why I keep it around. But an active favorite…? I have a couple of calculus books that I’m neutral toward, and that’s about as good as it gets.

But I know there are people who choose math as a career, so there must be people who actually like math books. So, what are some good ones?