Two locked-room murders, nearly 150 years apart, confound Sheriff Ike Schwartz of Picketsville, Va., in Ramsay’s suspenseful fourth regional mystery (after 2007’s Buffalo Mountain
). Schwartz discovers that both crimes, with sinister undertones of Poe, occurred at the antebellum-era Lydell mansion. The estate’s owner, Jonathan Lydell IV, is distraught to find his renovated “stranger room” (a guest room with its own outside entrance) soiled by death and the intrusion of law enforcement. While Schwartz and acting deputy Karl Hedrick (on loan from the FBI) contend with Lydell’s condescension and racism, they’re soon distracted by a growing meth epidemic, vandalism and even another death in Picketsville. Ramsay skillfully weaves historical fact into his story, all the while blending brisk action with excellent characterization. Schwartz has matured throughout the series, and readers will eagerly await his next adventure. (Aug.)