The shapes are a beautiful representation of the integration of mathematics and art, an idea both engaging and challenging. -- Mathematics Teacher, NCTM Jan 2011 The basic idea, though simple, seems to be rather novel. It is not addressed by the standard mathematics or modelling literature. Apparently, there are no known closed form solutions that will predict what 3D shape will result when simple 2D figures are joined at their perimeter into a D-Form - raising a challenge for some serious mathematical research....Fortunately no math or computer is required to build all of the D-Forms in this book....[just] good, educational entertainment. -- Carlo H Sequin, Journal of Mathematics and the Arts vol 3, no 4.