Softcover 4to, 44pp. No date, but an article about the book appears in the Dec 3, 1971 San Jose State "Spartan Daily" newspaper. Adhesive remainder to the upper left cover, mild rubbing and edgewear. Previous owner's signature on the title page, else unmarked. Great '70s graphic design and illustrations. Developed while Goldberg was a grad student at SJS to make sturdy geometrical models that "combine techniques from the mathematics and art classroom." Patterns are included to make a equilateral tetrahedron, equilateral hexahedron, isosceles hexahedron, cube, octahedron, decahedron, icosahedron, twenty-four triangular hedron, and concave hedron. Goldberg published a more popular variation of the book in 1977, without Sellars (misspelled "Sellers" on the title page). The newer "Pholdit" featured simpler shapes and was marketed toward a more general audience for "family fun." Scarce.