Halford said in a recent interview with Ultimate Classic Rock that he's looking forward to getting his story out there, but there are some details he's not so keen on reliving.
His book will be completely honest, he says; otherwise, why bother?
"There's no point in putting a book together if you don't have full disclosure, in my opinion," he said. "Since I've been clean and sober, I've probably been more honest and truthful about myself than I ever have been. You only get a chance to do it once and do it properly."
Halford shut down the idea of writing a book as recently as 2015, when he explained that he was uncomfortable sharing details about his personal life to the world. Though he acknowledged that some of his experiences could "really help somebody," he wouldn't want to write something that seemed "exploitative."
The Metal God has been sober since a painkiller overdose in 1986 prompted him to go to rehab to work on the whole of his substance abuse problems. He says he's still wringing his hands about how to present certains details in the book, but he has a framework of how the story will unfold.
"It's coming together and it's exciting, and I think we're hoping for it to be released sometime toward the back end of 2020, hopefully," he says.
News of Halford's memoir comes about a year after his longtime Judas Priest band mate K.K. Downing released his own tome, Heavy Duty: Days and Nights in Judas Priest. Details of Downing's book, as well as comments the guitarist made in subsequent interviews put Downing, Halford and longtime Judas Priest guitarist Glenn Tipton at odds publicly.
At one point, Halford chastised Downing (who is still a member of Judas Priest, despite not touring or recording with the band since 2010) for airing out the band's dirty laundry and detracting from the overwhelming success of Judas Priest's 18th studio album, Firepower.
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