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A bizarre F.B.I. study goes awry, leaving those who participated in the project vulnerable--to murder. The "Profile Experiment" has five college students draw on their darkest imaginings to construct the ultimate serial killer. It soon turns into an exercise in terror, however.
Used availability for Stephen R George's Bloody Valentine
January 1994 : USA Mass Market Paperback
June 2016 : USA, Canada, UK Kindle edition