Doyle and Fossey are on a mission - a monster mission! It seems there's a giant bloodsucking monster gasping and gurgling in their friend Gabby's garbage can. Can they figure out what's up before the creature gobbles Gabby for lunch? This and four more cool cases will have kids checking out the clues - and learning great science too, including facts about the life cycle of a frog and chromatography.

Illustrated by: Barbara Johansen Newman