In the third book in the critically acclaimed middle-grade series about mystery-solving siblings, Moxie McCoy, fourth grade detective, goes undercover.

Moxie joins the Wonder Scouts to investigate a suspected saboteur in the badge competition. She's never liked the Wonder Scouts, but once she joins the group, Moxie becomes enchanted with earning badges herself!

Meanwhile, someone has broken into Tiddlywhump's Local House of History, and it's up to Moxie's little brother, Milton, to begin his own investigation.

Can this irrepressible detective duo crack two different cases?

Richly illustrated and laugh-out-loud funny Matthew Swanson and Robbi Behr's Wonder Undercover is a must-have for young readers.

There are more mysteries in The Real McCoys series:
The Real McCoys
The Real McCoys: Two's a Crowd
The Real McCoys: Wonder Undercover

An Imprint Book

Praise for The Real McCoys:

A Junior Library Guild Selection

Readers will breeze through this ingenious combination of text and art, eager for Moxie and Milton's next case. --School Library Journal, starred review

Praise for The Real McCoys: Two's a Crowd

An outstanding, truly unique reading experience. --Booklist