This is a truly terrible book. The author, a middle class academic teaching at Edinburgh University in Scotland, clearly knows nothing of Scottish working class culture, which is the societal level which spawned Welsh's abrasive wordwork. Kelly basically makes up (seriously) most of this book, reading far-too-deep-and-tortuously-over-articulated meanings into short stories and novels that simply do not exist, supplemented by a selection of over-analytical, under-understanding quotes from other deluded examiners of Welsh's stuff.
When an author doesn't know that the use of the word 'us' in colloquial Scottish is simply a different way of saying 'me' and instead attributes this word in a sentence to a character talking about a 'multiplicity of personalities'...EVERYTHING he says is rendered suspect and void. If you want a critical analysis of Welsh that resonates with reason and reality, you will have to wait for another one, this being the first, because this man just doesn't know what the hell he is talking about. And he teaches this garbage to students too. Glad I'm not a student in his literature class.
Check out www.laurahird.com/newreview/irvinewelsh.html for a more in-depth review of this book.