This story contains graphic descriptions that some readers may find disturbing.

The soon-to-be released memoir from Virginia Giuffre, one of Jeffrey Epstein's accusers, posthumously sheds light on the infamous financier's abuses from the perspective of one of his most vocal victims.

"She wanted all her suffering to have accomplished something, and if she could help even one survivor of abuse, she said, it would be worth all the effort," co-author Amy Wallace wrote in a note at the beginning of the book – which USA TODAY obtained ahead of its release.

Giuffre, born Virginia Roberts, played a critical role in the investigations that eventually led to criminal charges against Epstein and his associate, Ghislaine Maxwell. The 400-page book was written before Giuffre died of suicide near her Australian home in April.

In it, Giuffre recounts her relationship with Epstein and Maxwell, alleges abuse from "a multitude of powerful men" and describes how she left the grip of the infamous couple. She also details what she alleges was an abusive relationship with her father – which he denies in a statement included in the book – and her life as one the most outspoken of Epstein's accusers.