Crooked Souls by Dashiell Hammett

A wealthy businessman hires a private detective to rescue his kidnapped daughter, but the case quickly veers into betrayal and deceit. As the detective digs deeper, he realizes the family itself may be hiding dangerous secrets. The plot is hard-edged and fast-paced, filled with shifting alliances. A classic Hammett tale of crime and cynicism. Sometimes the real threat isn’t the kidnapper—it’s the ones paying to stop him.