NYP2002050104- NEW YORK, May 1 (UPI) -Author Norman Mailer discusses his collaboration with author Lawrence Schiller on their book, "Into the Mirror," a fictionalized version on the life of convicted FBI spy Robert Hanssen, during a book promotional event held on April 30, 2002 at New York Barnes and Noble book store. Mailer first wrote the project on Hanssen as a T.V. movie script that Schiller turned into a novel. ep/Ezio Petersen UPI