In short: a strait-laced Professor is asked to write a tell-all book about the less-than-perfect Petrefacts.
To the average writer, this scenario could probably get a little tee-hee from the readers, but leave it to Sharpe to throw into the mixture the riotous "Ablution Bath", some midgets (or PORG - Persons of Unrestricted Growth), a sex toy factory, an outrageous interrogation / Silence Of The Lambs-themed chapter, and a crazy carwash incident and you get Tom Sharpe at his best yet again. Even the scene where Lord Petrefact explains to Croxley what he'd like served for dinner is a gem on its own.
Now, I'm the type who throws a book to the nearest bin when the ending is less than ideal but somehow, whenever I read Tom Sharpe's books, as far off as they are to having conventional happy endings, I always manage to put them back on my shelf with a huge smile on my face. So do yourself a favour and grab this book - I'm sure you owe yourself a good long laugh!