In "A Dram of Poison" by Charlotte Armstrong, a seemingly ordinary housewife, Mrs. Sperling, becomes entangled in a web of mystery and danger when she discovers a vial of poison in her husband's coat pocket. As she investigates further, she uncovers a complex plot involving blackmail, adultery, and murder. With her quick wit and determination, Mrs. Sperling races against time to unravel the truth and save herself from becoming the next victim.

Set in the early 20th century, this gripping narrative delves into the pioneering work of New York City's first medical examiner and his toxicologist partner as they revolutionize forensic science. Against the backdrop of Prohibition and rampant crime, the duo employs groundbreaking techniques to solve mysterious deaths and combat the era's "invisible" killers—poisons. Through a series of real-life cases, the story highlights the evolution of toxicology and its crucial role in the justice system, offering a fascinating glimpse into the intersection of science, law, and human nature.

In "Fer-de-Lance," readers are introduced to a brilliant, orchid-loving detective and his astute assistant as they embark on their first case together. The story revolves around the mysterious death of a college president, initially believed to be an accident. However, as the detective duo delves deeper, they uncover a sinister plot involving a uniquely deadly weapon, leading them into a world of danger and intrigue. Their investigation reveals hidden motives and a cunning murderer, showcasing their deductive prowess and setting the stage for future adventures.

A sharp-witted former apothecary nicknamed Maomao is seized from the city’s pleasure quarter and pressed into service in the imperial palace, where her knowledge of herbs, poisons, and medicine draws the attention of a perceptive eunuch and drags her into layers of court intrigue. Relying on forensic observation and pharmacological expertise, she quietly unravels mysteries—from subtle poisoning and baffling ailments to conspiracies—while navigating dangerous politics and protecting those she cares for. The story mixes historical mystery, dry humor, and slow-building relationships as she conceals her past to survive and influence the imperial world around her.