This document provides recommendations for books to read to learn about 3D printing. It lists several titles including "Open Book: Low-cost 3D Printing" which provides an introduction to 3D printing technology. Another recommendation is "Fabricated" by Hod Lipson which discusses how 3D printing is driving new forms of distributed manufacturing. The document also suggests "The Maker Movement Manifesto" by Mark Hatch as an overview of the maker movement and how 3D printing enables new opportunities for innovation.