"When I'm faced with a Pilkey fan looking to branch out, this graphic novel is the first book I reach for." ―The New York Times

With more than four million copies in print, #1 New York Times-bestselling author John Patrick Green's goofy graphic novel series is a colossal comics hit! Join super spy alligator duo MANGO and BRASH as they surf the sewers and fight the forces of evil.

Special agents Mango and Brash are asking their readers for help in cracking the case! The gators have been given a brand new add-on for their V.E.S.T.s to help with gathering evidence and making sense of clues - the G.R.I.D. (Gator Reasoning, Inquiry, Deduction) - and with that powerful tool in hand, kids can follow along as they solve six brand-new mysteries all by themselves! Featuring plenty of familiar faces from investigations past, as well as a few brand new suspects, Mango and Brash and YOU (the reader) will get to the bottom of cases big and small!