The Forgotten Lock

When private investigator Mara Sinclair is called to solve the baffling murder of tech billionaire Nathaniel Drake, she's faced with the perfect crime. Drake was found dead in his mansion’s panic room, sealed from the inside, with no possible way in or out. As Mara digs deeper, she discovers a tangle of suspicious characters, each with a motive—and an alibi. Among them is Drake's estranged daughter, an amnesiac who holds the key to solving the mystery, but whose mind has been shattered by traum...