Beverly Lewis 
Backyard Bandit Mystery (Cul-de-Sac Kids Book #15) 

Stacy Henry wants to earn money for the Cul-de-sac Kids Club. But she can’t get permission from Abby, the club president, who is out of town.The rest of the kids vote to go ahead with a yard sale. The friends make signs, and everyone brings old treasures for the big day. But one night, some of their treasures disappear!Is there a bandit in the neighborhood? Who is stealing from the Cul-de-sac Kids?