

Several of the murders may be copycatting Agatha Christie’s “The A.B.C. “It’s almost as though the murderer is testing these books in real life,” she theorizes. Mulvey thinks a serial killer is re-creating those perfect murders. Years earlier, Mal had posted on the bookstore’s blog a list titled “Eight Perfect Murders” that summarized brilliant strategies of unsolved murders from eight crime fiction classics. Everything’s routine there until one snowy day when FBI Special Agent Gwen Mulvey shows up asking questions.

The story’s narrator, Malcolm Kershaw, is the co-owner of the Old Devil’s Bookstore in Boston, a mecca for mystery fans. That’s what Peter Swanson cleverly pulls off in his new, engagingly original psychological suspense novel “Eight Perfect Murders” (William Morrow, 288 pp., ★★★ out of four). If ever there was a previous mystery novel that summoned plots of unsolved homicides from yesteryear’s classic thrillers to unravel its own whodunnit, none comes to mind.
