|The Stig regularly takes to the track on the BBC Two showbut never removes his helmet on screen. |
The BBC says the publication of the book breaches contractual and confidentiality obligations.
HarperCollins declined to give any official comment.
The dispute comes amid suggestions from several newspapers speculating that the character's true identity is former Formula Three driver Ben Collins, based on the financial reports of his company.
A BBC spokeswoman said: "The BBC is in a legal dispute over the publication of a book relating to Top Gear as this breaches agreed contractual and confidentiality obligations relating to the show.
"It was no surprise that Ben Collins' company listed Top Gear amongst its work as Ben had appeared numerous times on the programme and he often supplied other drivers for both the programme and Top Gear Live."