You have mastered the the simple shapes, now it is time to take it to another level. but paper is boring so here is what we are gonna do: we will use the real money. This book provides step-by-step instructions for 20 models that are bound to challenge even the most proficient folders: a butterfly, Formula 1 race car, a toilet,a koi fish, a fox, an ox, a scorpion, a sea turtle,a dragon, a spider and many more. Results are fantastic but beware, this book is not for the novice, although the presentation of the directions for completion of a fold is awesome.