Sales of O.J. Simpson's "If I Did It" book have exploded since the infamous star's death, with the publication skyrocketing to the top of the charts.
76-year-old O.J. died on Wednesday -- a day before the public found out -- when the Simpson family announced the news ... and reignited interest in the grizzly, 1994 double murders of Nicole Brown Simpson and Ron Goldman.
According to Amazon.com, the world's largest bookseller, "If I Did It" sits in the number 1, 2, and 4 spots (different versions of the book -- audio, abridged, unabridged) in the entire Criminology section.