The Cake Decorator's Motif Bible (Sheila Lampkin, Quarto, 2007, ISBN: 9781554072811) is nothing but the goods, with all the illustrations you need to complete any flat fondant project. Kuo Kan Chen is the illustrator, and without the easy-to-follow guides, the book wouldn't be as useful.
The book comes spiral bound which makes it easy to flatten the book to any page you are working on. The color photos and examples of finished alphabets at the back of the book make it also a pretty good pastry reference book.
For the full review, read it on the Pastry Sampler blog.