The unofficial biography of Prince Harry and Meghan Markle, Finding Freedom, was widely anticipated. Now released, the book by Omid Scobie and Carolyn Durand lays bare details of the Duke and Duchess of Sussex's romance, marriage and separation from the royal family.

However, a royal expert branded Finding Freedom as an "overhyped and trivial journal." British public relations consultant and commentator Richard Fitzwilliams says Harry and Markle's tell-all book hasn't gained the couple any sympathy.

"William's perceived 'snobbery' in asking if Harry was sure about Meghan, for example, is trivial. Whether or not he referred to her as 'that girl' actually made headlines in the Sunday Times which is stupefyingly silly," he said.

Finding Freedom's authors talk about Harry and Prince William's feud. Scobie and Durand claim a rift between the brothers started when the Duke of Cambridge commented on how fast his brother and Meghan Markle's relationship was going.

"What an overhyped and trivial journal," he said.

The book also contains claims about why Prince Harry and Meghan Markle decided to relinquish their royal roles. Fitzwilliams previously said Finding Freedom revealed only the "selfish" and "controlling side" of the couple.

Before its release Fitzwilliams warned the book would be like "dynamite" and may cause "serious harm" to their relationship with the royal family - especially Queen Elizabeth II.

Even though Harry and Markle's representatives say the couple didn't take part in the book Fitzwilliams says they could have easily put a stop to its publication.

However, the book isn't the only thing driving a wedge between Harry, Markle and the royal family. The Duchess of Sussex filed a lawsuit against the publisher of The Mail on Sunday and MailOnline for publishing part of a private letter to her estranged father Thomas Markle.

Markle's legal team claims she was "unprotected by the Institution" while pregnant. It says she was frustrated the royal family "prohibited" her from "defending herself."