David Kirsch, New York's top personal trainer to supermodels and A-list actresses, has never come across a butt he couldnt sculpt. He can make them higher, rounder, tighter, larger, and smaller. With the Butt Book, you can choose the intensity of your workout based on your fitness levels and desired goals. This definitive butt-sculpting manual, brought to you by Space NK, also includes lifestyle and diet advice. It is designed for women and men of all body types, both beginners and advanced.