SOMETHING SMELLS FISHY IN HERE

Detective Zengo and Detective O'Malley are on a missing frog case, but it seems that other fishy things are turning everywhere.  Professor Hopkins (the frog) has been missing for a few days - and the illegal fish trade at East Kal High (where he taught) is on the rise.  Are the two cases connected?  Will two platypi be able to locate the missing frog, or is this more than a missing persons case and actually a murder?  Who is behind the disappearance and the illegal fish?  Is it the Football Star, the local Panda mayor, or the fox bus boy?  There's only one way to found out the answers to all these questions, and that is to follow Detectives Zengo and O'Malley of the Platypus Police Squad in their first case, The Frog Who Croaked by Jarrett J. Krosoczka.  This fun mystery from the author of the graphic novel Lunch Lady series is great for kids in grades 4-6.