In her third mystery featuring Trinidadian police sergeant Wesley Peterson (after 2000's The Armada Boy), Ellis proves herself once again adept at linking a contemporary British police procedural to a crime from centuries in the past that neatly parallels the present-day murder. When the body of Pauline Brent, a doctor's receptionist, turns up hanging from a yew tree in Stokeworthy churchyard, Wes and his colleagues of the Tradmouth (Devon) police soon determine that she was initially strangled. But who would want to murder Pauline, who by all reports had led a blameless life? While Wes and his team interview people who knew the victim, who mysteriously doesn't have much of a past, an archeological dig unearths the 500-year-old skeleton of a young woman whose broken neck suggests that she was hanged. As the police draw closer to identifying Pauline's killer, 15th-century legal documents just as suspensefully reveal an ancient miscarriage of justice. Besides providing a clever dual mystery, Ellis humanizes her characters with glimpses into their reassuringly ordinary personal lives. (Wes's wife, Pam, for instance, worries about finding child care for their newborn son.) This is a series that just gets stronger with each new book. (May 14)Forecast:With its appealing cast of police officers, its English village setting and ingenious but not overly complicated plot, this series would seem a natural for TV adaptation in the author's native Britain.