Sell, buy or rent Robert J. Lang textbooks

Origami Design Secrets: Mathematical Methods for an Ancient Art, Second Edition

by Lang, Robert J.
ISBN-13: 9781568814360
ISBN-10: 1568814364
Edition: 2
Publication date: 2011
Publisher: A K Peters/CRC Press
Format: Paperback 770 pages

Twists, Tilings, and Tessellations: Mathematical Methods for Geometric Origami

by Lang, Robert J.
ISBN-13: 9781568812328
ISBN-10: 1568812329
Edition: 1
Publication date: 2014
Publisher: A. K. Peters
Format: Paperback 776 pages