Barely a month after its release, Pippa Middleton’s critically slated book ‘Celebrate’ is already available at less than half-price (£12) on Amazon, although from the reviews one would imagine that is still a tad over-priced….by about twelve quid. She did get an advance of £400,000 for the book and it has spawned a spoof Twitter account, Pippatips, so all is not lost.