In 2006, Charles Shields reached out to Kurt Vonnegut in a letter, asking for his endorsement for a planned biography. The first response was no (“A most respectful demurring by me for the excellent writer Charles J. Shields, who offered to be my biographer”). Unwilling to take no for an answer, propelled by a passion for his subject, and already deep into his research, Shields wrote again and this time, to his delight, the answer came back: “O.K.” For the next year—a year that ended up being Vonnegut’s last—Shields had access to Vonnegut and his letters.