great books on photography

This is really just another attempt at an interesting thread. I don't know a lot about photography and would like to learn from others what have influenced them.

I'll start. I have just started reading On being a photographer by David Hurn and Bill Jay. I'm only about a third of the way through and find it more fascinating than any book on photography I've read before. It seems to me that the books I'd read before were really about how to use a camera but this one is different. I can easily guess that when I'm finished this will be one of my favorite books, much less photography books.

Does anyone else have a favorite photography book? If so, please post a comment!