A U.S. panel investigating the crimes of Jeffrey Epstein has requested that the executors of his estate produce a number of documents, including a book said to have contained personal messages for his 50th birthday.

The subpoena from James Comer, the leader of the House Oversight Committee, represents an expansion of his investigation into Epstein, the disgraced late paedophile financier.

Last month, the Wall Street Journal reported that the birthday book his associate Ghislaine Maxwell created in 2003 contained submissions from various Epstein acquaintances, including a bawdy note allegedly bearing the name of Donald Trump, who was then his friend.

Trump has denied writing any such letter. The president said the alleged note was 'fake' and began defamation proceedings against the Journal's parent company and its owner, Rupert Murdoch. The company, Dow Jones, stood by its reporting and vowed to fight the legal case.

Comer's subpoena asks that the executors of Epstein's estate provide 'all entries contained within the reported leather-bound book compiled by Ms. Ghislaine Maxwell'. It gives a deadline of September 8 for the item to be turned over. A lawyer for the Epstein estate confirmed receipt of the request, and said the executors would 'comply with all lawful process in this matter, and that includes the Committee's subpoena'.

This inquiry is part of a larger investigation that also demands any non-disclosure agreements executed by Epstein over a three-decade period, along with his will preceding his death in jail in 2019. Among the requested documents is any evidence that could suggest a list of clients involved in sex, sex acts, or sex trafficking by Epstein.

Despite this, the U.S. Department of Justice and FBI have stated that no such list existed. Maxwell, currently serving time for her role in Epstein's offenses, also denied the existence of a client list in a recent inquiry by a U.S. Department of Justice official.

As conspiracy theories around Epstein persist, Trump has faced pressure from his supporters to clarify his connections with Epstein, raising questions about transparency in previous investigations. The investigation encompasses further subpoenas issued to entity such as the U.S. Department of Justice and high-profile individuals, including former President Bill Clinton and former Secretary of State Hillary Clinton.

Reports arose that Trump himself was informed by Attorney General Pam Bondi in May that his name appeared in files related to Epstein. Historically friends with Epstein until their falling out in about 2004, Trump's association with Epstein has been the subject of scrutiny, although he has never faced direct allegations regarding wrongdoing in such context.