'William and Catherine: Their Story' is a lushly illustrated book detailing the courtship and recent wedding of Prince William and Catherine Middleton. It's penned by Andrew Morton, author of the groundbreaking biography of Diana, 'The Diana Chronicles,' which was written with the Princess's full (though secret) cooperation and blew the lid off her dysfunctional marriage and life behind the palace doors. Morton spoke to PopEater as his new book was hitting bookstores about William and don't-call-her-Kate's fairytale engagement, whether Diana would be pleased with her daughter-in-law and he gives his take on everyone's favorite sister, Pippa.

Do you think Catherine was surprised by the amount of press her sister Pippa got on the wedding day?
I think she would have been. It's amazing what a pert backside can do! It's amusing, but it's slightly misogynistic isn't it? Just as William and Harry are very competitive, Catherine and Pippa are very competitive. The day was Catherine's day and Pippa played a significant walk-on part, that was it. I don't think she stole the show. Pippa has an exotic walk-on part.