"...learn how wheels work along with axles and how they use mechanical advantage to make it easier to move heavy objects from one place to another."--Provided by publisher.

Andi Diehn has written many books for children, and a few for adults as well. She works as an editor and marketer for Nomad Press and lives with her family in rural New Hampshire.

Micah Rauch is a freelance graphic designer and illustrator from the beautiful state of Montana. He received a BFA in graphic design from Montana State University in Bozeman, Montana, and has illustrated several books for Nomad Press, including Kitchen Chemistry, Fairground Physics, and Crazy Contraptions.