The so-called truth about Bruce Willis and Demi Moore's relationship could come straight from the horse's mouth, as their former stable rancher is planning a tell-all book.

Lawrence Bass - who used to manage the pair's ranch in Idaho - claims to have plenty of dirt on the formerly married Hollywood duo, reports Sky News.

Bass, who once accused Moore of sexual harassment though investigators threw out the complaint, has had several bust-ups since with Bruce and Demi. The pair has successfully filed for restraining orders against Bass.

"I can't describe what a loser this guy is. All his claims are bogus. He's a desperate guy, a convicted criminal who spent time in jail. I doubt anyone will have anything to do with him or his manuscript," said Moore and Willis' lawyer Marty Singer.

Meanwhile, Bass is determined to spill the beans. "They've tried to stifle me, but it won't work," he maintained. About Moore's humble upbringing, he said: "You can take the girl out of the trailer park, but you can't take the trailer park out of the girl."