Nearly a century after his wrenching death, the Portuguese poet Fernando Pessoa (1888–1935) remains one of our most enigmatic writers. Believing he could do “more in dreams than Napoleon,” yet haunted by the specter of hereditary madness, Pessoa invented dozens of alter egos, or “heteronyms,” under whose names he wrote in Portuguese, English, and French. Unsurprisingly, this “most multifarious of writers” (Guardian) has long eluded a definitive biographer—but in renowned tran