Book excerpt: This is a working camera that pops up from the pages of a book..The book concisely explains--and actively demonstrates--how a structure as humble as a folded piece of paper can tap into the intrinsic properties of light to produce a photograph.The book includes:- a piece of paper folded into a working 4x5" camera- a lightproof bag- 5 sheets of photo-paper "film"- development instructions (from complete DIY to "outsource it")- a foil-stamped cover- a satisfying demonstration of the connection between design & science / structures & functions