It is the first book from Pippa and it intends to be a 'one-stop guide to entertaining through the British year', showcasing personal tips, recipes and decorating ideas.
From planning to the events themselves, the Duchess of Cambridge's sister covers New Year's Eve, family birthdays, Sunday brunches, and even breakfast in bed.
Drawing on her experience with her parents party-supply business and her time at an London events company, Pippa gives tips on how to cook the perfect roast and shows how to create home-made Christmas decorations.
It has sparked mixed reviews from critics, saying that some of the tips are quite obvious, such as decanting milk into a jug to create a special breakfast.
Despite claiming the book is fully of affordable ideas, it has also been picked up for offering tips such as garnishing scrambled eggs with 'inexpensive caviar and truffle oil for a decadent treat'.
The book has reportedly secured her a £400,000 deal from publisher Michael Joseph and will be published in the UK and US.
Pippa will be celebrating the launch with a small party in London this evening, but it is thought Kate Middleton will not be attending as she can not be seen to be endorsing a commercial venture. Meanwhile Prince William is on duty in his day job as a Search and Rescue pilot.
What do you think? Will you be buying her book?
Celebrate is available now, £25