In Search Of Mercy by Michael Ayoob (Minotaur, $24.99, 293 pages, ISBN 978-0-312-64492-5) I just finished reading a new, award-winning first novel by a young upcoming writer named Michael Ayoob, for whom I predict a major writing career.  IN SEARCH OF MERCY features an unlikely private eye named Dexter Bozjak.  He’s twenty-something and mentally depressed, lives in Pittsburgh, where his only accomplishment in life until now, was to be