The Keeper — Charles Martin

Combine James Patterson and Colleen Hoover and you'll start to understand why readers are riveted by the Murphy Shepherd series: gripping action, heart-wrenching emotion, and deep questions that deserve to be considered.

In this fourth book in the Murphy Shepherd series, Murphy knows Bones didn't hesitate to give his life to stop the evil perpetuated by his brother, but there's still work to be done. Though Frank is gone, his organization is not, and almost even before Bones's funeral in Arlington is complete, Murph receives a call that the three daughters of presidential hopeful Aaron Ashley have been taken and there are no leads.

The girls' lives on the line and time is of the essence. But Murphy has never done this without Bones. How can he grieve his friend and mentor, figure out who he is without Bones, and navigate a new role for himself with team . . . all while putting total focus into finding these daughters?

When his daughters are finally rescued, Ashley steps back from the presidential race. But Murph knows something about the timing is a little too convenient for the senator who steps in to take his place. The far-reaching tendrils of Frank's organization are entangled even here, and Murph and his team will stop at nothing to root them out.