Penner's story starts strong but peters out as the engaging premise gets muddled in convenient plot turns, though the author does a good job of making two disparate stories into eventual foils for one another. Back in the present, Caroline contends with James showing up and getting accidentally poisoned after trying to win her back. Penner switches from Caroline's sleuthing to the story of the apothecary, Nella Clavinger, who gave poison to women to use on men who wronged them in various ways.

Her research on the bear etched on the bottle turns up newspaper articles about the suicide of a woman known as the London 'Apothecary Killer' in 1791, and leads her to the site of the woman's shop. There, she finds a glass vial in the Thames. After Caroline Parcewell learns her husband, James, is having an affair, she flies alone from Ohio to London on what was meant to be their anniversary trip. In Penner's faltering debut, a contemporary American woman uncovers a clue to a series of unsolved murders in 18th-century London. From Booklist, Copyright (c) American Library Association. Readers who enjoy Katherine Howe and Susanna Kearsley will be drawn to this promising, fast-paced debut. Penner finds clever parallels between Nella and Caroline, and avoids the pitfall of one storyline outshining the other-all three women have compelling tales, and while Nella's business may not be on the up-and-up, her motives are understandable. Her investigation into the bottle's provenance unravels the long-hidden mystery of Nella's apothecary, while also reminding Caroline of her pre-marriage dreams. Determined to make the best of the situation, Caroline joins a mudlarking expedition and finds a mysterious bottle in the river.

In the present day, Caroline's romantic anniversary trip to London becomes a solo sojourn because of her husband's infidelity. The two form a tenuous bond that quickly strengthens when Nella's livelihood is threatened. Nella's dreams of motherhood were destroyed by a callous young man, and Eliza is curious about the intricacies of Nella's business. Her latest customer is Eliza, a servant girl charged with procuring poison for her mistress. In the late eighteenth century, Nella owns an apothecary specializing in remedies for women, with a brisk side business in poisons.

The lost apothecary series