The Laundry books are sharp, well laid out, good typography and easy to read with great art and writing. I love the design though, it really captures the setting.
As a friend said to me, this one is almost arousing.
Kult 2nd Edition
The Core rulebook is gorgeous and creepy, and I love it, in fact I liked pretty much all the 2nd edition books. The Magic Guides were very well done, in full color. Hard to describe without being able to show off the insides.
Beyond the Boundaries
Heart Mind & Soul