Carpenter and Quincannon novels

In The Bughouse Affair, former Pinkerton operative Sabina Carpenter and her detective partner, ex-Secret Service agent John Quincannon, undertake what initially appear to be two unrelated investigations. Sabina's case involves the hunt for a ruthless lady "dip" who uses fiendish means to relieve her victims of their valuables at Chutes Amusement Park and other crowded places.

Quincannon, meanwhile, is after a slippery housebreaker