The Rule of Threes
Constant Marlowe follows a serial killer deep into the dark heart of a small town in this riveting novella by Jeffery Deaver, the New York Times bestselling author of The Broken Doll collection and the Colter Shaw series.
Special Agent Constant Marlowe is tasked with taking over the investigation of an obsessed serial killer trolling the small town of Clark Valley in the quiet—and eerie—plains of the Midwest. Two female victims in quick succession, the same brutal MO, and every indication that victim number three is only days away. Also in the killer’s scope is Constant herself. When she interviews a local family who may be potential witnesses, she leads the devil to their doorstep, throwing their lives into chaos. Constant will do anything to protect them, but it won’t be easy. Because nothing in Clark Valley is quite what it seems.
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Jeffery Deaver
Long before The Bone Collector introduced the calculating brilliance of Lincoln Rhyme to readers around the world, Jeffery Deaver was already quietly assembling the tools of his trade: a fascination with psychology, a sharp legal mind, and a love of music that taught him how to pace a story like a song, with rising tension, sudden drops, and crescendos that leave you breathless.
Born outside Chicago in 1950, Deaver’s path to becoming one of the most inventive voices in modern crime fiction wasn’t linear. He studied journalism, practiced law, and even considered a career in folk music before finding his stride in fiction. That varied background seeps into his novels, where legal nuance, technical precision, and psychological complexity collide in plots that are always one twist ahead of the reader.
Special Agent Constant Marlowe
Special Agent Constant Marlowe consists of 2 total books. The current recommended reading order for the series is provided below.










