The Alienist by Caleb Carr is a historical fiction novel set in 1896 New York City. The story revolves around a team of investigators, including psychologist Dr. Laszlo Kreizler, who are tasked with solving a series of gruesome murders. As they delve into the twisted minds of the killers, they uncover a dark conspiracy that leads them to question the nature of humanity itself. This gripping tale combines elements of mystery, psychology, and science fiction to create a truly immersive reading experience.