Winner of the 2021 IBPA Gold Medal for Best Hobby and Craft Book, Marvelous Magnetic Machines: Building Model Electric Motors from Scrap is an inventive and visually captivating guide for anyone fascinated by electricity, magnetism, and mechanical design.

Author H.P. Friedrichs—a professional electrical engineer, inventor, and the celebrated author of The Voice of the Crystal and Instruments of Amplification—returns with a new collection of projects that demonstrate how to build five fully functional electric motors from salvaged materials. Using hand tools...