Andrew Windsor and Sarah Ferguson are set for another takedown in a new book

The royal author, whose recently published controversial biography, Titled: The Rise and Fall of the House of York, caused widespread fallout for Andrew, 66, and Ferguson, 66, last year has now confirmed he is now developing a follow-up investigation after being contacted by dozens of new sources.

The renewed investigation into the couple comes as questions continue to swirl around the Duke and Duchess of York’s business dealings, charitable activities and relationships with wealthy international figures following the release of court files linked to Epstein.

Lownie said of how he has already released an updated version of Entitled: “I wrote Titled: The Rise and Fall of the House of York. After I published it last year, dozens of people, including former staff, school friends, security guards, colleagues and diplomats, came forward with new stories about the couple’s behavior.”

He added: “From the 200,000 words of notes, I have added an additional 40-page chapter on allegations of Andrew Mountbatten-Windsor’s predatory sexual behavior, abuse of his taxpayer-funded role, Sarah Ferguson’s relationships with some of her financial mentors and her dealings with Alphabet Capital and the daughters’ charitable activities.”

In a confession that will shake Andrew and Sarah to their core, Lownie added: “I’m also working on a follow-up book.”