The Bughouse affair

"In 1890s San Francisco, former Pinkerton operative Sabina Carpenter and her detective partner, ex-Secret Service agent John Quincannon, undertake what appear to be two unrelated investigations. While Sabina hunts for a ruthless lady pickpocket, Quincannon is after a slippery housebreaker who targets wealthy homes. The cases connect in a surprising fashion, but not before two murders and other assorted felonies complicate matters. And not before the two sleuths are hindered, assisted, and exasperated by the bughouse Sherlock Holmes."--Page 4 of cover.