Following Queen Elizabeth II’s death, some people have turned to unexpected sources for insight into the future of the monarchy—one of them being Nostradamus: The Complete Prophecies for the Future, a 2015 book by Mario Reading.

The book is said to have foretold the Queen’s death in 2022 and goes even further, suggesting that King Charles will eventually step down and be replaced by a man few would expect.

As reported by Wales Online, the book is described as “the only Nostradamus book on the market that deals exclusively with the French physician’s future prophecies,” based on Reading’s theory that Nostradamus’ quatrains are date-indexed and correspond to specific years.

The book has been credited in the past for predicting several major world events, including the 2007 assassination of Benazir Bhutto, the 2008 global financial crash, and the 2015 terrorist attacks in Paris.

Reading explained his approach to interpreting Nostradamus’ writings: “There are a couple of quatrains that are really quite stunningly prescient and they were the ones I discussed at the time. I dated them, according to index dates, between two and three years out — but I think when I read them to you you’ll realise how specific they are.”

He cited one quatrain specifically: “Because of French carelessness and misunderstanding; the Mohamedens will find a way in. Blood will soak the Seine by land and sea; The Phocenesian port will fill with sails and vessels.”

Reading emphasized how clearly it seemed to describe an attack on Paris and noted, “Since the book came out, virtually every single quatrain has come nearly or completely true. I can really stand there and say, hand on heart, go and look at the early editions — nothing has changed.”