Let Sleeping Dogs Spy — Jane B. Mason; Sarah Hines Stephens

Use what you find.
Employ your powers for good causes, not evil deeds.
Together you will solve many mysteries.
Good Luck!

When four friends stumble across a mysterious note and a stash of spy gear, they are primed for an adventure. Little do they know that intrigue will find them. . . . Someone is attempting to sabotage their school's production of The Wizard of Oz and only the girls of the brand-new Spy Society can unravel the mystery!