Theodore Gray has become a household name among fans, both young and old, of popular science and mechanics with his bestselling trilogy of books: The Elements, Molecules, and Reactions. In How Things Work, he explores the mechanical underpinnings of dozens of types of machines, from the cotton gin to the wristwatch to an industrial loom, and shares his deep, firsthand appreciation and knowledge of the world's most essential mechanical systems. Filled with stunning original photographs by Nick Mann, How Things Work is a must-have exploration of stuff-large and small-for any builder, maker or lover of mechanical things.

Theodore Gray is the author of The Elements, Molecules, and Reactions, as well as Theodore Gray's Completely Mad Science. He is the creator of the bestselling iPad apps "Elements" and "Molecules," which have both been named App of the Week by Apple, and was the director of "Disney Animated" (also honored by Apple as iPad App of the Year). Gray appeared onstage with Steve Jobs several times in his capacity as a software creator. He also co-founded Wolfram Research, Inc., makers of the widely used software Mathematica and the Wolfram Alpha website. He lives in Urbana, Illinois.
Nick Mann is a photographer specializing in taking beautiful photos of inanimate objects on black backgrounds. His other work includes The Elements, Molecules, and Reactions. Originally of Urbana, Illinois, he lives in Champaign, Illinois.