MALCOLM BURGESS takes a sideways look at what the publishers' back cover blurbs really mean. This week - Irvine Welsh.

Britain's most brilliant and controversial youth author - Eat your heart out Mr Martin mid-life crisis and that's a nice bit of orthodontry - did it cost you very much? - Amis.

A cast of inimitable characters - People who would have been burnt at the stake not so long ago.

Inspired a whole new generation of writers - Chiefly graffitists.

More than a book - We don't want to call this literature in case it puts off readers who think it's an e-handbook.

Powerful and disturbing - Regular Wet Wipe users might not get beyond page two.

About Britain today - Depressing.

The book that defines the nineties - Pass the Prozac.

Sexually explicit - Although for some of the characters their main problem is premature evacuation.

Now a major film - Just in case you've been hiding in that cupboard again.