This is the website for a popular mathematics book by Henry Segerman, a mathematician and mathematical artist. Most of the figures in the book are photos of 3D prints. On this website, readers can rotate figures around on screen (using sketchfab.com), order the models (using shapeways.com), or download the models to print out for themselves (direct from this website, or using thingiverse.com). A zip file containing all of the 3D model files listed on this website is available below.
Henry Segerman is an Assistant Professor in the Department of Mathematics at Oklahoma State University. In addition to his research interests in three-dimensional geometry and topology, he is also a mathematical artist, working primarily in the medium of 3D printing. His website is http://segerman.org.