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Bollywood actor Sanjay Dutt has slammed Yasser Usman, the author of Sanjay Dutt: The Crazy Untold Story of Bollywood?s Bad Boy.

Dutt said he has not authorised anyone to write a book on him and that his official biography will be released very soon.

?I have not authorised either Juggernaut Publications or Yasser Usman to write/publish my biography. Our lawyers had sent them a legal notice, in response to which Juggernaut Publications said that contents of the proposed book are based on information available in public domain from authentic sources," the actor said on Twitter.

?However, from the excerpts that are appearing in the newspaper are partly based on my old interviews, but rest all seemed to be based on hearsay, 1990s? tabloids and gossip magazines, most of which are figments of imagination and not true. I have consulted with my legal team on the next course of action,? he added.

The actor further said, ?I hope better sense will prevail and there will be no further excerpts that will hurt me or my family. My official autobiography will be out soon which will be authentic and based on facts."

The Crazy Untold Story of Bollywood?s Bad Boy focuses on Sanjay Dutt?s early life, his relationship with his parents and his very public life. It also talks about his interaction with the underworld and his connection to the 1993 Mumbai serial blast case.

A biopic based on the life of the actor titled Sanju is set to be released on June 29 this year.