14/08/2014 12:40 BST | Updated 20/05/2015 06:12 BST

Why Pippa Middleton Won't Be Writing A Follow Up To Her Entertaining Book Celebrate

The Duchess of Cambridge's sister, Pippa Middleton, has been dropped by her book publishers - so it looks like a follow up to her entertaining guide Celebrate is off the table. Oh dear.

Pippa and her plans for a new party planning book have been quietly swept under the rug by her American publisher, Viking Press, after they sold just 18,000 copies.

Pippa Middleton Book Launch - London

"Pippa's Celebrate sales are nothing to celebrate," a source told The Sunday Times. "She was a superstar after the wedding, and everybody thought it would be a success.

"Even Sarah Ferguson sold more books when she started her writing career."

It's hardly surprising Pippa's new book is going nowhere though. She was forbidden from doing any interviews to promote it at the time of the launch.

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