The 400-page book, Celebrate: A Year of Festivities for Families and Friends, offers party planning tips for decidedly British occasions (tea and crumpets, anyone?), drawn from Pippa's experience as a party planner. So far, we're only getting to see the cover, which seems to take some major design cues from Pinterest. According to People, the book will be available for sale on October 30 and will cost $50.