The LEGO Technic Idea Book: Wheeled Wonders
Yoshihito Isogawa
The LEGO Technic Idea Book (1)
The LEGO Technic Idea Book: Simple Machines
The LEGO Technic Idea Book (2)
The LEGO Technic Idea Book: Fantastic Contraptions
The LEGO Technic Idea Book (3)