Guess Again by Charlie Donlea

Ten years ago, 17-year-old high school volleyball star Callie Jones vanished from her quiet Wisconsin lake community. A highly publicized search followed but her body was never found. The case went cold, but the echoes still linger.

Ethan Hall, a former renegade detective turned ER doctor, left law enforcement to escape the horrors of the kid crime division. But on the tenth anniversary of Callie’s disappearance, his former partner, Pete Kramer, makes a desperate request. Pete is the veteran detective who originally investigated the case. Now he’s dying, and to ease his conscience and get closure for the Jones family, he needs Ethan to return to the haunting work he left behind—and solve what happened to Callie, once and for all.
Word soon spreads and everyone in the small town of Cherryview feels a rush of hope that answers will finally be found. Amid a sweltering heatwave, Ethan’s investigation gains momentum, but reexamining old evidence won’t be enough. He needs a new way into the case, no matter how dangerous or unconventional. And it comes from the least likely of sources—an inmate in a maximum-security prison.

Soon Ethan’s methods draw him deeper into a twisted psychological game. Because there is much more to the nightmare of Callie’s disappearance than he imagined, including a connection with his own dark past . . . and secrets that are still worth killing for.