Alinas, M: Diggers

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. 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.