“Pets and the City: True Tales of a Manhattan House Call Veterinarian,” animal doctor Amy Attas dishes on what she’s learned about the lives of New York’s wealthy and well-known by visiting their homes to care for their four-legged family members.Attas launched her mobile practice, City Pets, in 1992. Joan Rivers, whom she had impressed with her no-nonsense approach to treating the comedian’s Yorkie, Spike, at Park East Animal Hospital, was her first client.Other notables, including Billy Joel, Elton John, Paul McCartney, Wayne Gretzky, Erica Jong and Steve Martin, followed.