I found The Throwback to be one of the funniest books ever drawn from the 'deranged' mind that is Tom Sharpe. The son, of who(?), is the nemisis of all that is ordered, sane and loyal. The grandfather (of who?) is as mad as a kipper. The wife....doh! The lawer, the butler, the taxidermist, the flawshounds......need I go on?
There is always a danger that his books will date, or become socially unnaceptable due to the changing values of todays readers (something which would be unfortunate and self parodying as the humour is always about challenging stupid social values).
However, The Throwback is self contained, without time and a joy to behold. Anyone not offended, or who doesn't laugh out loud at the same time, isn't reading it properly