This is an enjoyable, entertaining read. In fact I read it in one sitting. I should try and pace myself but I got caught up in the story and just kept reading.
I think it has been written with the idea of it being translated into a TV series and, with the right actors it would work well. The author, Richard Osman, has a background of working in TV, (Pointless Quiz), so that makes sense. It is amusing, has pathos, an entertaining story line and keeps you guessing until the end.
(It would also make a good Xmas present and I see it is now for sale in Target and Woolworths at a good price. That is one present taken care of.)