Steve Wraith — who will pen Unfinished Business with pal Stuart Wheatman of Mojo Risin’ Publishing — said: “Paul’s a very intelligent man but he’s somebody who I suppose is very guarded.
“It takes time to build up confidence with Paul. He was aware of me which is beneficial and liked my Kilroy interview. I found that quite reassuring.
“In the last six months we’ve spoken a lot on the phone and exchanged various pointers about what we can do.
“We’re going to pay tribute to Reg and Paul really wants to do that. He played a huge role in Paul’s life.”
The Ferris Conspiracy charted his rise from childhood to feared underworld figure working for Glasgow Godfather Arthur Thompson Snr.
But the pair fell out spectacularly and in 1992 Ferris walked free from the longest murder trial in Scottish legal history when he was found not guilty of Arthur ‘Fat Boy’ Thompson Jnr’s execution.
Six years later he was convicted of gun running at the Old Bailey. Steve added: “The Ferris Conspiracy was a brilliant read but there’s stuff I’d have put in there.
“Redoing the book would be unfair to Reg — there was nothing wrong with the original. We would just like to put a Mojo slant on Paul’s life. We’d like to bring Paul’s character out, put different stories in. He’s a very funny guy when you get to know him, quite a humorous guy.
“We did an interview the other night about prison life and there’s a lot of black humour in prison. We were focusing on a lot of things that people won’t have heard about Paul but things people can probably relate to.”
The dad-of-four — donating profits from his latest book to the cancer foundation that treated Reg before his death seven years ago aged 56 — vowed to leave a life of crime behind him after his release from jail in 2002. Three years ago he featured on a Who’s Who list which said he had shown “exceptional commitment to achieving personal and professional success” in his work as the boss of repeat offenders’ charity MIDAS.
Steve said: “It’s a major turnaround for him. We could’ve called the book Going Straight.”