Jeffrey Masson graduated from the Toronto Psychoanalytic Institute and was briefly Projects Director of the Sigmund Freud Archives. The book he wrote with Susan McCarthy on animal emotions, When Elephants Weep (1994), became a bestseller in the United States. Since then he has published nine books on animals and their emotions, including Dogs Never Lie About Love, The Nine Emotional Lives of Cats and most recently, The Dog Who Couldn't Stop Loving. He lives with his family in Auckland, New Zealand.

Susan McCarthy, who goes by “Sumac” on SorryWatch.com, is the coauthor (with Jeffrey Moussaieff Masson) of the international bestseller When Elephants Weep: The Emotional Lives of Animals, which has been translated into twenty-one languages. She’s also the author of Becoming a Tiger: How Baby Animals Learn to Live in the Wild.

Publications she’s written for include Parade, The Guardian, WIRED, Smithsonian magazine, Outside, and Salon. Her work has been anthologized in The Best American Science Writing and in Mirth of a Nation: The Best Contemporary Humor. She lives in San Francisco.