Chance by Kem Nunn Scribner, $26.00, 320 pages, ISBN 978-0-7432-8924-5 Some of the best thriller and crime fiction stories are built around the premise of an ordinary person being put into an extraordinary situation. For example . . . Peter Parker is bitten by a radioactive spider and as a result, develops supernatural powers which totally change his life as he becomes 'The Amazing Spiderman,' a crusading crime fighter