John Travolta has been sued by a man who wrote a book detailing the actor's alleged gay sex exploits.

Robert Randolph, who wrote to me You'll Never Spa in This Town Again, has taken John and his attorney Marty Singer to court for an unspecified amount of damages.

According to TMZ, Robert claims that the Academy Award-nominated actor and his lawyer made sure to actively "diminish his credibility".

Robert says that he personally witnessed John performing gay sexual acts with men at spas. These events are recounted in You'll Never Spa in This Town Again.

Apparently after the book was published, Marty and John "falsely claimed Randolph had mental issues and spent time in a mental institution."

These accusations made it difficult for the author to sell the book, as retailers were hesitant about stocking it.

Seven men have recently accused John of making inappropriate sexual advances towards them.

John's camp has strenuously denied all of the allegations, but it is rumoured that the actor is in quiet settlement talks with at least one of the accusers.