Read on the recommendation of [a:Donalyn Miller|1970104|Donalyn Miller|http://d.gr-assets.com/authors/1249616174p2/1970104.jpg]. Well thought out picture-book treatment of the world of beetles. With the level of detail, this is a picture book better suited to grades 1-3 than the pre-K set - though if you have a bug obsessed younger one, I'd give it a try, though you might abridge the text.
My 3rd grader picked it up after I left it on the couch. His response was "beetles are scary Mom." Living in a relatively cold climate, he found the idea of hand-sized bugs, like those found in certain warmer parts of the world, disconcerting.