The Lego Power Functions Idea Book, Volume 1 by Yoshihito Isogawa

The Lego Power Functions Idea Book, Volume 1 : Paperback : No Starch Press,US : 9781593276881 : 1593276885 : 19 Feb 2016 : "A compilation of small projects to build with LEGO Technic parts, including gears, motors, gadgets, and other moving elements. Contains step-by-step building instructions for rack-and-pinion steering systems, sliding doors, grasping claws, and ball-shooting devices. Explores principles of simple machines, gearing, and power translation"--