Beyoncé and Jay-Zmust be used to having to deal with bizarre rumours by now, but this time someone's decided to write all about them in an actual book.

No, we're not sure why either.

Titled 'Becoming Beyoncé: The Untold Story', author J Randy Taraborrelli revisits 'that' elevator incident, claiming that Rihanna was actually the cause of Solange attacking Jay Z.

It's also alleged that Bey and Jaysplit in 2005 after rumours were supposedly spread by PRs to aid Rihanna's rise to fame, which Solange can't let go of, apparently.

"Beyoncé didn't know what to make of this, and it actually ended up breaking them up for a time," the book claims.

Adding: "They spent maybe a year apart from each other because Beyoncé just wasn't sure of what to make of the situation with Rihanna."

As for now?

"It's safe to say that Rihanna and Beyoncé are friends."

HMMM. Pinch of salt.

He also reckons he knows all about Bey's requests for any nannys that look after daughter Blue Ivy.

Taraborrelli explained: "If you are a nanny coming into her household, and you think you are going to just raise Blue Ivy the way you want to, that's not gonna happen."

"Beyoncé has sort of an agreement, a structure of how she wants her child to be raised and you have to adhere to this," he says.

- By Lucy Bacon