Man with the Jaguar Heart weaves together two remarkable journeys: the fictional tale of Big John, a former Harlem gangster who receives a centuries-old jaguar heart during a desperate surgery in the segregated South and is transformed into something beyond human, and the true story of Howard Jefferson himself, who nearly died during open-heart surgery in 2024 and emerged with this complete story already formed in his mind. Set against the Amazon rainforest, the back streets of 1960s Florida, and the depths of America's racial history, the novel explores themes of power, redemption, and what it means to protect the vulnerable when the world would rather use you as a weapon. In the epilogue, Howard reveals that he — like Big John — faced six blocked arteries, technically died on the operating table, and recovered against all medical expectation. The story, it seems, came back with him.