lies at the heart of this page-turning thriller about a missing teacher, small town secrets, and turbulent tween friendships from master of middle grade horror Mary Downing Hahn.

When best friends Abbi and Skylar witness a clandestine meeting between a mysterious woman and someone in a dark van, they're thrilled. Finally, a mystery to spice up the summer!

Who could these people be? Why are they meeting? Are they spies? Criminals? The two girls are determined to find out. But then a local woman goes missing and is found dead in the woods. And Abbi and Skylar realize that their detective work could hold the keys to solving her murder. Suddenly, sleuthing isn't so fun anymore.

As tensions rise and their friendship frays, the girls find themselves in increasing danger, and must choose between keeping a secret or exposing a life-altering truth.