The LEGO® Technic Idea Book Simple Machines

"These are an invaluable set of books to have as a reference to build mechanisms."
BrickJournal 

"I can emphatically state that no self-respecting LEGO fan should exclude this series from their library."
Bricks in my Pocket 

"These are excellent books showing a lot of great ideas for LEGO mechanisms. Even if you're an experienced builder, there are surely some ideas in here you've never seen."
Brickpile 

"For those new to Technic building, the Simple Machines book is indispensable."
The NXT STEP Blog 

"What I like about these cool little models is that they can be used to teach various science concepts such as gearing, Newton's Laws, and Potential & Kinetic energy to name a few."
The Robotic Realm 

"This is an eccentric but seductive book."
;login: The USENIX Magazine 

"For anyone who loves Lego, prototypes in Lego, or loves mechanical assemblies, these books are definitely required viewing, and we're not sure how we lived without them for so long."
Evil Mad Scientist Laboratories