The magnum opus of one of the worlds leading origami artists the second edition of Origami Design Secrets reveals the underlying concepts of origami & how to create original origami designs. Containing step-by-step instructions for 26 models this book is not just an origami cookbook or list of instructions--it introduces the fundamental building blocks of origami building up to advanced methods such as the combination of uniaxial bases the circle/river method & tree theory. With corrections & enhanced illustrations this new expanded edition also covers uniaxial box pleating introduces the new design technique of hex pleating & describes methods of generalizing polygon packing to arbitrary angles. With coverage spanning the foundations of origami construction & advanced methods using both paper & pencil & custom-built free software Origami Design Secrets helps readers cultivate the intuition & skills necessary to develop their own designs. It takes them beyond merely following a recipe to crafting a work of art.