The Boa Murders (Private Detective Murders, #6)

One look at the two teenagers told me they were scared as much as humans can be and with good reason. They were wearing scarlet Boas, a symbol for a certain group of streetwalkers who were being murdered by a maniac the police hadn't been able to nab. They introduced themselves as Doris and Maisie and asked me for help. I said I would. But how? The police had zero information on the killer. That meant I was on my own.