The LEGO® Power Functions Idea Book, Volume 2: Cars and Contraptions

LEGO® Technic Non-Electric Models: Simple Machines

LEGO® Technic Non-Electric Models: Clever Contraptions

The LEGO® MINDSTORMS Robot Inventor Idea Book

The LEGO® MINDSTORMS EV3 Idea Book: 181 Simple Machines and Clever Contraptions

The LEGO® BOOST Idea Book: 95 Simple Robots and Hints for Making More!