i bought the hardback version for a quid the other week, and while the 'twist' at the end is sadly obvious and the writing a wee bit pedestrian, its not a bad holiday read.
i did find the authors habit of using similar words together, as though showing off his wordpower incredibly tedious and annoying, athough again, there are good points in the book.
the general premise, for example, is great.
dont expect a classic here, just make sure you buy it for less than say, £2 to ensure you get your moneys worth. having said that, i would like to give the guy a chance and read 'Day's' too.