They're Gone A Novel.

Two women's husbands are murdered on the same night in the same way-and their investigation uncovers a terrifying connection. Two men from vastly different backgrounds are murdered one after another on the same night, in the same fashion with two bullet wounds: one in the head, another in the heart. The two slayings sends their wives on a desperate search for answers-and a desperate attempt to save their families' lives. Grief takes a heavy tol...