Parnell Hall (writer)Parnell Hall (born October 31, 1944) is a mystery writer. His works include the ''Puzzle Lady'' and the Stanley Hastings series, as well as the screenplay to the 1984 cult classic ''C.H.U.D.'' He has collaborated with Manny Nosowsky for crossword puzzles and with Will Shortz for sudoku puzzles incorporated in Puzzle Lady stories.
He also has written under the pen name J.P. Hailey, under which he wrote the Steve Winslow series. He co-authored "Smooth Operator" with Stuart Woods. Provided by Wikipedia