Jeffrey Epstein ordered books on Amazon about sadomasochism and how to use sex slaves, court documents unsealed Friday alleged.

The documents included a photo of an Amazon receipt for the titles "SM 101: A Realistic Introduction," "SlaveCraft: Roadmaps for Erotic Servitude," and "Training with Miss Abernathy: A Workbook for Erotic Slaves and Their Owners."

Giuffre's attorneys alleged in the filing that the "disturbing 2005 purchase" from Amazon corroborated Giuffre's — and other victims' — accounts of being sexually exploited by Maxwell and Epstein.

Visit INSIDER for more on Jeffrey Epstein.

The financier and accused sex trafficker Jeffrey Epstein ordered books on Amazon about sadomasochism and how to use sex slaves, according to court documents unsealed on Friday.

The documents included a photo of an Amazon receipt under Epstein's name for the titles "SM 101: A Realistic Introduction," "SlaveCraft: Roadmaps for Erotic Servitude," and "Training with Miss Abernathy: A Workbook for Erotic Slaves and Their Owners."

The documents say the receipt was recovered from Epstein's trash by a Palm Beach police officer. A search on Amazon shows that the books are, indeed, sold on the website.

Read more: Epstein files unsealed: Thousands of accusers' documents have been released from the defamation suit against his ex-girlfriend and alleged 'pimp'

Prince Andrew and Virginia Giuffre, then known as Virginia Roberts, along with Ghislaine Maxwell. This photo was included in an affidavit where Giuffre claimed Prince Andrew directed her to have sex with him. Florida Southern District Court

The receipt was included in a 2017 court document as part of a lawsuit filed by Virginia Giuffre against Ghislaine Maxwell, Epstein's ex-girlfriend and alleged madam.

Giuffre has alleged for years that Maxwell recruited her at the age of 16 to give Epstein massages, which quickly devolved into sexual abuse that continued for years.

After Maxwell publicly accused Giuffre of lying, Giuffre sued her for defamation, and thousands of pages of documents were filed under seal. A federal appeals court unsealed a trove of those documents on Friday.

Giuffre's attorneys alleged in the filing that the "disturbing 2005 purchase" from Amazon corroborated Giuffre's — and other victims' — accounts of being sexually exploited by Maxwell and Epstein.