LISA Marie Presley is writing a book that will reveal the most explosive secrets about her marriage to Michael Jackson, it has been reported.

The only daughter of Elvis Presley has signed a deal worth $4million (£3.3m) to lift the lid on her time married to the King of Pop, who she wed in a private ceremony in 1994 but divorced in 1996.

The 51-year-old has signed a deal with Gallery Books for between $3million and $4million.

The book "promises shocking revelations about Michael Jackson and a completely new understanding of Elvis," a source told the New York Post.

Their unlikely marriage came as Jackson was facing unprecedented scrutiny about his private life – namely his string of close friendships with little boys.

The celebrity couple faced relentless rumours their relationship was a publicity stunt.

The allegations have returned with the release of HBO's "Leaving Neverland,"  which has resulted in the Jackson's estate has taking legal action.

Though the marriage is covered in the film, Presley hasn't yet commented.