In the third book of a richly illustrated, laugh-out-loud funny middle-grade series, Moxie McCoy, fourth grade detective, goes undercover.

Moxie joins the Wonder Scouts to investigate a suspected saboteur in the badge competition. But soon Moxie becomes enchanted with earning badges herself! Meanwhile, someone has broken into Tiddlywhump’s Local House of History, spurring Moxie’s little brother, Milton, to begin his own investigation. Can this irrepressible mystery-solving duo crack two different cases?

Told in Moxie’s singular voice, Wonder Undercover delivers clever storytelling in an irresistible, unique package.