Declaring that “it’s time take poop out of the closet,” Goodman plops factual pellets from human and natural history alike into topical chapters covering dung’s nature; production; varieties; uses in love, war, and, yes, sports; the development of flushing toilets (pointedly scrubbing the myth that Thomas Crapper was solely responsible); toilet paper; and urban waste reclamation. Smith takes on the subject with appropriate lack of gravity, adding lots of small, pop-eyed animals and people amid flushes of comic-strip dingbats. The author brings up the rear with recommended paper and web resources. A steaming pile of fun, redolent of wide-ranging research but most suited to recreational dipping, and a fine lead-in to Masoff’s monumental Oh, Yuck! The Encyclopedia of Everything Nasty, illustrated by Terry Sirrell (2000). (Picture book/nonfiction. 7-9)