Big machines at work

"Smash! A massive bulldozer flattens a building! Learn more about how bulldozers move over any surface, and find out what they are used for. Additional features to aid comprehension include a table of contents, informative sidebars and captions, an activity, critical-thinking questions, sources for further research, a phonetic glossary, an index, and an introduction to the author"--

Whirr! A concrete mixer's drum spins round and round! Learn more about why these big machines never stop moving.

Boom! A digger picks up a huge boulder and drops it a few feet away! Diggers come in all shapes and sizes--learn more about how they work and what they are used for.

Presents facts about fire trucks, including how they work, their drivers, major parts, the different kinds of fire trucks, and why they are important.

Presents facts about tow trucks, including how they are used, their working parts, how they work, different sizes of tow trucks, and why they are useful.