These critters are disgusting -- and fun, too! -- and now they're brought together for the first time in a new collection! Learn about flies, spiders and worms in this hilarious illustrated nonfiction, perfect for beginning readers. Flies can walk on the ceiling. Worms have existed for 120 million years. And spiders have four pairs of eyes. What do they have in common? They're all disgusting! Elise Gravel's Disgusting Critters series has charmed and grossed out thousands of readers. This paperback bind-up of three of nature's most beloved, and yuckiest, creatures -- the fly, the worm and the spider -- is filled with fascinating facts and hilarious humor that will amuse and teach at the same time.