Robert Oppenheimer - the father of the atomic bomb - was a brilliant scientist, a champion of liberal causes, and a complex and often contradictory character. In Louisa Hall's kaleidoscopic novel, seven fictional characters bear witness to his life.

From a secret service agent who tailed him in San Francisco, to the young lover of a colleague in Los Alamos, to a woman fleeing McCarthyism who knew him on St. John, as these men and women fall into the orbit of a brilliant but mercurial mind at work, all consider his complicated legacy while also uncovering deep and often unsettling truths about their own lives. In Trinity, Louisa Hall has crafted an explosive story about what it means to truly know someone, and about the secrets we keep from the world and from ourselves.