I'm not reading "diet" books anymore--my "diet" is the way I plan to eat the rest of my life (with a little more chocolate thrown in, basically, once I'm in maintenance).
A book I got out of the library which I plan to buy (and that happens maybe 3x a year) is Food Matters. by Mark Bittman. He lays out a fantastic blueprint for eating whole, unporcessed foods--including a meal plan, how to stock the pantry and cook all kinds of healthy foods.
On the "real life motivation" side I really enjoyed Passing for Thin by Frances Kuffle. She's an amazing writer and even though I have not been fat since childhood, I identified with a lot of what she had to say about trying to adjust to the world as a "normal" person. It was amazing.
This is a fantastic thread--just start reading, you'll find some gems of your own!
my weight loss blog: http://mypsychemysoma.blogspot.com/
"Your best weight is whatever weight you reach, when you're living the healthiest life you actually enjoy." Yoni Freedhoff