These thrillers come with something extra:atmosphere, character and conflict resolution.  In “The Other Mother” by Carol Goodman, a woman assumes best friend’s identity and flees home and husband, infant daughter in tow, to take a job as a live-in archivist for her favorite author. “In the spirit of Du Maurer’s Rebecca, Goodman has concocted a labyrinthine tale deliciously riddled with dark motives and tangled identities” (Kirkus).     “The Flight Attendant” by Chris Bohjalian takes off the morning after a drunken hook-up in Dubai, when the titular character awakens to a most unpleasant surprise.