There seems to be quite the trend these days to capitalize on children’s fascinations with the gross and disgusting.  Many of the books I’ve read in this line have either failed to live up to being as icky as it proclaimed, or else hyped the ew without delivering any real information.  This one really was delivering honest-to-goodness scientific information, and it really was icky enough to make me squirm.  Illustrated with a combination of photos and cartoons.