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.
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Used availability for Stephen R George's Bloody Valentine
January 1994 : USA Mass Market Paperback
June 2016 : USA, Canada, UK Kindle edition