The Wolf of Wall Street, Jordan Belfort, served time at Taft Correctional at the same time Tommy Chong was there. They were cellmates. Jordan saw that Tommy Chong was writing The I Chong: Meditations from the Joint and wanted to do the same.
Tommy Chong read his first draft and didn't like it. Jordan rewrote the book and this is the version that was released.
In today's TMZ interview, Tommy rehashes the same story.