Lucy Sante is the award-winning author of numerous books. Her latest, Nineteen Reservoirs tells the story of the massive and disruptive project undertaken to bring a clean water supply to New York City. While Lucy was writing the book, she was also going through a major change in her own life. Named Luke at birth, at the age of 66, Sante decided to do something she had thought about all her life: transition to a woman. We talk about the complexities of gender and identity.