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William's "Recurring Nightmare" about Kate

It looks to all the world like a storybook romance now, but some real-life chapters in the story of Britain's Prince William and his new fiancée, Kate Middleton, were anything but.

In his new book, "William and Kate: A Royal Love Story," best-selling author Christopher Anderson chronicles the royal couple's relationship. And, on "The Early Show" Tuesday, Anderson told co-anchor Rebecca Jarvis about some of their rockier times - and what binds William and Kate to each other.

He told Jarvis why Prince Charles once advised his son, William, to break up with Kate, which William did, in 2007 - and how she quickly won William back.

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Anderson revealed the large role Kate's mother, Carole Middleton, had in bringing her daughter and William together. He also outlined the traits that make Kate the woman she is - and that he feels will enable her to do fine as Queen.

Anderson says he began to write the book a year ago, when sources told him there'd be a royal wedding this spring.

And he spotlighted what he called William's "recurring nightmare."

"William and Harry," Andersen told Jarvis

To see the entire Andersen interview, click on the video below:

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To read an excerpt of "William and Kate: A Royal Love Story," click here.

"William and Kate: A Royal Love Story," is from Gallery Books, a division of Simon and Schuster, whose parent company is CBS, the same as CBSNews.com.