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On, Off is written by Colleen McCullough and published by Simon and Schuster. It's available with International Standard Book Number or ISBN identification 1416517227 (ISBN 10) and 9781416517221 (ISBN 13).
Realizing that a brutalized young woman is the latest victim of a serial murderer, 1960s lieutenant Carmine Delmonico traces clues that identify the killer as one of several secretive employees at a world center for neurological research.