Dickie Arbiter’s On Duty With The Queen: An Expose About Princess Diana, Prince Charles & Camilla Parker-Bowles [PHOTOS]

Former royal spokesman Dickie Arbiter will soon unveil his own tell-all book about the royals' dirty laundry particularly the love triangle between Princess Diana, Prince Charles and Camilla Parker-Bowles. The Duke of Cornwall is allegedly furious about the upcoming memoir of the former aid as it threatens to air secrets about the Prince's ugly divorce from the People's Princess and his affair with Camilla.

"Charles is furious. This man was a trusted friend," a source told Mirror during an interview. Arbiter is Duke's trusted confidante and Buckingham's press secretary for 12 years, and was "regarded by Charles as a man he could trust with his deepest secrets."

The book, "On Duty with the Queen: My Time as a Buckingham Palace Press Secretary," will be released in October which accounts Arbiter's palace life from 1988-2000. The palace aid promises "a candid look behind the scenes of the most sensational and salacious royal stories," which made Charles so nervous that he and his lawyers are trying to have the book killed.

"He is raking over the breakdown of the marriage and the Prince has been asking aides 'Why do we have to go through this all again?" a palace insider told the publication. "It is just a case of a man who he thought was a friend and who could be trusted cashing in on the misery of that time. It is disloyal. Arbiter has been told that he does not have official permission to write this book and a legal team has reviewed all his old contracts in a bid to try and find a way to stop it."

On his recent interview, Arbiter admitted that he signed a confidentiality agreement during his time as the royal's press secretary and but assured fans that his upcoming book will not break any confidentiality. He is expected to earn around £250,000 from publishing advances and serialization fees.

The highly anticipated book will also cover Prince Andrew and Sarah Ferguson's divorce in 1996 and Princess Anne's separation from Mark Philips in 1992. Aside from dishing the royals' secrets, the book is also about his extraordinary life in the halls of Buckingham Palace.