Alexandra Horowitz is the author of three previous books, Being a Dog: Following the Dog Into a World of Smell (2016); On Looking (2013); and Inside of a Dog: What Dogs See, Smell, and Know (2009), a New York Times bestseller. She is Senior Research Fellow and head of the Dog Cognition Lab at Barnard College, Columbia University. She is owned by canines Finnegan and Upton, and tolerated by feline Edsel.