The paperback version of Andrew Morton's book, "The Queen: Her Life," was recently published. The bestselling author is known as Princess Diana's biographer. Kate Middleton was said to be wary of taking on Princess Diana’s coveted title after Queen Camilla "shied away" from it.

According to reports, the former Camilla Parker Bowles was lined up to be known as the Princess of Wales after she married King Charles (then Prince Charles) in 2005. However, she opted to be known as the Duchess of Cornwall instead. Camilla, 77, was crowned alongside Charles in May 2023.

The king, 75, ascended to the throne upon the death of his mother, Queen Elizabeth II, in 2022. PRINCE WILLIAM ONCE 'DUMPED' KATE MIDDLETON OVER THE PHONE, SHOUTED 'I'M FREE!' AT LONDON NIGHTCLUB: AUTHOR Kate Middleton is seen here with Camilla, who was styled the Duchess of Cornwall after her marriage to the former Prince Charles. (James Devaney/Getty Images) "It's understandable why Camilla shied away from being known as Princess of Wales," Christopher Andersen, author of "The King," told Fox News Digital.

"She was Princess Diana's hated archnemesis; Diana called Camilla ‘the Rottweiler,’ and Camilla's nickname for Diana was ‘Barbie.’" "The two women were fierce archrivals, and Camilla famously broke up the marriage of Charles and Diana," Andersen shared. "Millions of people resented Camilla, and it hardly would have been in her best interest to rub their noses in it by insisting on calling herself Princes.