ORIGAMI DESIGN SECRETS, 2ND EDITION
This new edition of Origami Design Secrets adds several diagrams for new models, 10 crease patterns for new designs, and new chapters on advanced box-pleating techniques, hex pleating, and polygon packing methods of origami design. ODS2e has 200 pages of new material not in the first edition, but I took out the chapter on mathematical algorithms, figuring most people would not be interested in big, hairy equations.