Ex-prison officer in bias claim.
The Catholic, who has asked not to be named, says he has kept a dossier for 15 years on how he and other Catholics who worked at Magilligan were treated.
And new details relating to a settled Fair Employment case are set to emerge.
The ex-warder told Sunday People last night of a sensational new book.
And he claims that because most of it is already contained in court records, lawyers are set to give it the go-ahead.
Last year we reported how one Catholic prison officer received pounds 60,000 in an out of court settlement.
He had been dismissed from his post after being accused of inefficiency.
Sources say the FEC lawyers were able to turn up work records of TEN Protestant warders which were much WORSE than the Catholic officer who lost his job.
Those records showed how Protestant jailers kept their posts despite:
their criminal records
convictions for gross indecency and drug abuse
taking part in illegal pro-Drumcree parades
having taken hundreds of days off sick.
The NIO used taxpayers' money to settle the case.
By settling out of court the Prison Service was able to save the embarrassment of a tribunal hearing which was due to last up to three weeks.
Now a second former warder will claim that he too was discriminated against.
And that other officers, members of a secret Masonic Lodge, were openly sectarian towards him.
Some warders, he will claim, took part in loyalist demonstrations while supposedly on sick leave.
"I have a story to tell and I intend to tell it," said the ex-officer.
"There is no way they are going to get away with it."