Sum 41's Deryck Whibley vouches his memoir is '100%' true after ex-manager's denial that he 'groomed' and 'sexually abused' the singer.

Whibley recently published his memoir, 'Walking Disaster,' which alleges Sum 41's former manager groomed him at 16

Deryck Whibley is embracing the whole truth of his rock 'n' roll journey. The Sum 41 singer, who released his memoir "Walking Disaster: My Life Through Heaven and Hell" on Tuesday, opened up about the sexual abuse he allegedly suffered during his relationship with the band's former manager,

Throughout the pages of “Walking Disaster,” Whibley describes a fraught and frightening relationship with Sum 41’s first manager, Greig Nori, whom the singer alleges groomed and sexually and verbally abused him for years, starting when he was 16 and Nori was 34.

My Life Through Heaven and Hell,' Sum 41's Deryck Whibley recalls the former couple's relationship was "based on sex, drugs, booze and partying."

In the book, Whibley, 44, claimed that in the band’s early days, he was groomed and sexually and verbally abused by Nori. He alleges that the grooming began when he was 16 and Nori — who’s also the frontman for the Canadian punk band Treble Charger — was 34.

When you buy through links on our articles, Future and its syndication partners may earn a commission. Sum 41 frontman Deryck Whibley is challenging his former manager Greig Nori to meet him in court to settle the veracity of Whibley's allegations that he ...

Deryck Whibley has accused Sum 41 ‘s first and former manager of emotional and verbal abuse. According to claims outlined in Whibley’s new memoir, “Walking Disaster, My Life Through Heaven and Hell,” the frontman was groomed and sexually and verbally abused by Greig Nori during the first stages of Sum 41’s career.

Sum 41 frontman Deryck Whibley hit back at ex-manager Greig Nori’s accusation that Whibley “initiated” their relationship in an Instagram video on Tuesday. Whibley accused Nori of sexual and verbal abuse and grooming,

"If you think I'm a liar, there's only one way to settle this," Whibley said. "Under oath, in front of a judge"

Last week, Deryck Whibley published a memoir titled Walking Disaster. The day before its publication, the Sum 41 frontman talked with the LA Times about the book’s sexual assault accusations against the band’s former manager Greig Nori.