Robert K. Ressler, Tom Shachtman
: St. Martin's Press. 1998.
In his phenomenally successful "Whoever Fights Monsters", Robert K. Ressler examined his brilliant 20-year career hunting down killers for the FBI. Now, delving deeper than ever before into the criminal mind, Ressler recounts his years since leaving the FBI, working as an independent criminal profiler on some of the most famous serial murder cases of our day. Includes exclusive, final interviews with serial killers John Wayne Gacy and Jeffrey Dahmer. National publicity.