The Ripper's shadow / Laura Joh Rowland.

"Miss Sarah Bain, a photographer in Whitechapel, is an independent woman with dark secrets. In the privacy of her studio, she supplements her meager income by taking illicit "boudoir photographs" of the town's local ladies of the night. But when two of her models are found gruesomely murdered within weeks of one another, Sarah begins to suspect it's more than mere coincidence. Teamed with a motley crew of friends--including a street urchin, a gay aristocrat, a Jewish butcher and his wife, and a beautiful young actress--Sarah delves into the crime of the century. But just as she starts unlocking the Ripper's secrets, she catches the attention of the local police, who believe she knows more than she's revealing, as well as from the Ripper himself, now bent on silencing her and her friends for good. Caught in the crosshairs of a ruthless killer, Sarah races through Whitechapel's darkest alleys to find the truth...until she makes a shocking discovery that challenges everything she thought she knew about the case."--Amazon.com