Close-up and macro - Robert Thompson
Digital nature photography - Jon Cox

I assume you're not just talking about photography books with pretty pictures, but about techniques, ethics, practices etc.

Michael Langford - 'Basic Photography' [link]
Michael Langford - 'Advanced Photography' [link]d_sim_b_1
Liz Wells - 'hotography: A Critical Introduction' [link]d_sim_b_2
Liz Wells - 'The Photography Reader' [link]d_sim_b_5

The Liz Wells books are quite heavy going and are all about the history, messages, symbolism etc. All of the above books are recommended reading for degree level photography.

John Berger - 'Ways of Seeing' [link]d_sim_b_6

I haven't read this one or own a copy, but it is supposed to be very good.

Andy Rouse - 'Wildlife Travel Photography' [link]

Fantastic book.

I have a huge collection, if I think of any more I'll add them.

Do you know the "FotoCommunity"-Site? I thhink yes, or?

Scott Kelby 'The Digital Photography Book' - it may be not that advanced but every and I mean EVERY photographer should read it, at least to know how to use a tripod extremely properly. You'll remember what I've said when you've read it. Beside National Photography books - they've published lately new series which are quite advanced.

Flickr, Facebook, MySpace

Corbis.com.

-A.C.

I don't look at many that aren't those funny cat books you find in Borders, but I'm really fascinated by the National Geographic Photography collection of all their award winning photos....don't know if that means anything

It depends on what kind of photography books you're talking about. Showcases of images, famous photographer's works.. or like, how to's?