William Diehl was an American author best known for his gripping crime and thriller novels. Before turning to fiction, he enjoyed a long career as a journalist, an experience that lent his writing a sharp, authentic edge. His breakthrough novel, "Primal Fear," captivated readers with its intense courtroom drama and shocking twists, and was later adapted into a critically acclaimed 1996 film starring Richard Gere and Edward Norton. Diehl also wrote other celebrated thrillers, including "Sharky's Machine" and "Reign in Hell." He passed away in 2006, leaving behind a legacy as a master of the American crime thriller.