Inspired by Sherlock Holmes, an exhilarating new thriller from the bestselling author of The Girl in the Spider’s Web—a murder investigation in which two unlikely allies race to uncover a shadowy international conspiracy.Professor Hans Rekke is a world authority on interrogation techniques, capable of dizzying feats of logic and observation. He was born into wealth and power and has a picture-perfect wife and daughter. But he also has a fragile psyche that falls apart under p