The following unabridged reviews are made available under license from their respective rights holders and publishers. Reviews may be used for educational purposes consistent with the fair use doctrine in your jurisdiction, and may not be reproduced or repurposed without permission from the rights holders.

Note: This section may include reviews for related titles (e.g., same author, series, or related edition).

From Publisher's Weekly

Starred review from June 29, 2015
First-time novelist Sands has written an exciting and self-assured tale of alchemy and dark secrets set during the late-17th-century reign of King Charles II. Fourteen-year-old orphan Christopher Rowe is lucky to be apprenticed to a kindly apothecary, Master Benedict Blackthorn. But someone-the Cult of the Archangel, it is rumored-is murdering London's apothecaries, believing that members of the Apothecary's Guild are concealing a dangerous secret. Christopher is an easygoing boy, fond of pranks and experiments (the book opens with his ill-advised and ill-fated attempt at mixing up some gunpowder), but after Master Benedict is assaulted, he finds himself on the run, pursued by the murderous henchmen of a rival apothecary and the dangerous Lord Richard Ashcombe, His Majesty's Warden. Sands adeptly balances the novel's darker turns with moments of levity and humor, and fills the book with nicely detailed characters and historical background-plus lots of explosions. It's a story that should have broad appeal, while especially intriguing readers with an existing interest in chemistry, history, and decoding puzzles. Ages 10—14. Agent: Daniel Lazar, Writers House.

From AudioFile Magazine

Whether they're in mortal terror or mere horseplay, narrator Ray Panthaki makes the dialogue between the two heroes of this audiobook sound honest and warm. Christopher is apprenticed to kindly apothecary Benedict Blackthorn. Despite Christopher's lowly upbringing, he receives training in Latin, astronomy, ciphers, potions, and other skills he needs when a murderous cult targets London's apothecaries. Christopher's best friend is Tom. Like Harry Potter and Ron, they're a memorable pair. Panthaki clearly defines the varying social standing of the many characters of through his diction. The only drag on the pace of the adventure is the occasional recitation of lengthy ciphers. Readers may try decoding them, but for listeners they're a distraction. L.T. Winner of AudioFile Earphones Award © AudioFile 2015, Portland, Maine