Some that I own:
Vegan Planet (Robin Robertson)
Veganomicon (Isa Chandra Moskowitz & Terry Romero)
Vegan Cupcakes Take Over The World (Isa Chandra Moskowitz and Terry Hope Romero and Sara Quin)
Vegan With A Vengeance (Isa Chandra Moskowitz)

The next one on my list to buy is Get It Ripe (Jae Steele) -- I saw it in a bookstore and it looked great.

These cookbooks are by two vegan bloggers:
Yellow Rose Recipes (Joanna Vaught)
My Sweet Vegan (Hannah Kaminsky)

Other ones I've seen on Amazon.com that look good:
The Complete Vegan Kitchen (Jannequin Bennett)
Vegan Homestyle (Kay Hansen)
Just going to Amazon and typing in "vegan cookbooks" will get a LOT of hits.

There are a lot of vegan blogs online right now (and many of the people who write them are making their own cookbooks), so looking online for recipes is a great idea too. The website http://vegblogsearch.com/ is run by a vegan blogger...you can look up recipes by ingredient or name or whatever.