This book is an absolute delight. It may well be a pastiche of the country house mystery, but if you imagine Agatha Christie mixed with PG Wodehouse, you won't be far from knowing what to expect here. You have to suspend disbelief of course as coincidence piles on coincidence, people seem to know their movements to the second which surely ain't natural, the mystery is suitably tangled and the denouements (there are a few!) are done very tongue in cheek as they conform to all the cliches you'd expect. That is praise by the way.
This is perfect winter holiday reading, easily digested and you will have a beaming smile on your face by the end. Just don't expect "hard-boiled"