In response to teacher requests, and in honor of NCTM where I'm presenting later this week, I've combined all 13 GeomeTricks books as a single bundle (in PDF format).
Purchased individually, all 13 books total $139.95. The bundle price is $109.95. And from now until May 20, the bundle is offered at the sale price of $89.95.
If you teach geometry, want to learn geometry, or are a math enthusiast, these books contain hours upon hours of fun and interesting projects. You'll learn all about tiling and tessellation, fractals, regular and irregular polygons, mosaics, symmetry, and Platonic and Archimedean solids. All in step-by-step, illustrated tutorial format, great for all levels of SketchUp users, for both Mac and PC.
I'm offering this set in PDF only; printed books are still available ala carte (I have much less price flexibility with printed materials).
Anyone can design anything in 3D! http://www.3dvinci.net/