The Last Mrs. SummersLady Georgiana Rannoch is just back from her honeymoon with dashing Darcy O'Mara when a friend in need pulls her into a twisted Gothic tale of betrayal, deception and, most definitely, murder. . . . I am a bit at loose ends at the moment. My cook, Queenie, is making my new role as mistress of Eynsleigh something akin to constant torture as Darcy is off on another one of his top secret jaunts. And Grandad is busy helping wayward youths avoid lives of