Pippa’s Plodding Publishing Premiere

Pippa Middleton at the launch of her event-planning book, “Celebrate,” in London on Oct. 25, 2012 Photograph by David Levenson/Getty Images

Poor Pippa. Ms. Middleton may be related to royalty, but her new event-planning book, Celebrate, has garnered lackluster reviews and sold only 2,000 copies in its first week—far fewer than expected. It’s a disappointing debut for a project that publisher Penguin Books had bet big on, with an advance of about $600,000. Bloomberg Businessweek spoke with top party planners about what went wrong.

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