IN THE SHADOW OF THE ARCH

In The Shadow Of The Arch ($23.95; Jan. 15; 368 pp.; 0-312-18115-9): Transplanted from the Big Apple to St. Louis, Detective Joe Keough (Alone with the Dead, 1995) hits the ground running in his search for the Mall Rat, a killer who preys on blond mothers and their young childrenand who may have orphaned a little boy who turns up outside the station in Keough's first day on the job.