Incoming Resources
- Machines go to work in the city, William Low
- Simple experiments with levers, Chris Oxlade
- Loaders, by Charles Lennie
- Giant machines, by Seymour Simon
- Simple experiments with inclined planes, Chris Oxlade
- Screws, Andrea Rivera
- Inclined planes, by Joanne Mattern
- Simple experiments with pulleys, Chris Oxlade
- The unofficial LEGO technic builder's guide, Paweł "Sariel" Kmieć
- Machines go to work, William Low
- Simple machines, Cody Crane
- Working machines, John Marshall
- Wheels at work, Andrew Dunn ; illustrated by Ed Carr
- Machines and mechanisms, Yoshihito Isogawa
- You wouldn't want to live without simple machines!, written by Anne Rooney ; illustrated by Mark Bergin
- Levers, by Joanne Mattern
- Cranes, by Charles Lennie
- Wheels and axles, by Joanne Mattern
- Wedges, by Joanne Mattern
- How things work, discover secrets and science behind medieval machines, jet packs, movie magic, and everything in between, by T.J. Resler
- Machines, Wendy Baker & Andrew Haslam ; written by David Glover ; photography by Jon Barnes
- Simple machines, a Sesame Street science book, Marie-Therese Miller