Authors Joan Horvath and Rich Cameron are coming out with a new book, called The New Shop Class: Getting Started with 3D Printing, Arduino, and Wearable Tech. They invited me to write the foreword for it! The book was formally announced at the 3D Printing World Expo (2015) last weekend. The alpha version (for download as the chapters come out) is available through this link.
Joan also wrote Mastering 3D Printing and What Scientists Actually Do.