The Secret (Jack Reacher 28) by Lee Child

In the latest Jack Reacher thriller from bestselling authors Lee Child and Andrew Child, a series of mysterious deaths grips the nation.
Set in 1992, these deaths initially seem unrelated until a fatal incident catches the attention of the secretary of defense.
Suddenly, an interagency task force is assembled, with Jack Reacher representing the army.
Tasked with getting results, Reacher finds himself entangled in office politics and faced with three crucial questions: Who can he trust?
Who opposes him? And will the justice he seeks align with official protocols or his own uncompromising standards?
As Reacher navigates the complexities of the investigation, the stakes couldn't be higher in this gripping tale of suspense and intrigue.