When I go to places and do book tours, I don't really like doing traditional bookshops. It's nice to walk people through something instead of just standing up in a bookstore.

The inspiration can come in such small ways that if you sit there just waiting for the big epiphany you'll sit there for the rest of your life.

We start off with high hopes, then we bottle it. We realise that we’re all going to die, without really finding out the big answers. We develop all those long-winded ideas which just interpret the reality of our lives in different ways, without really extending our body of worthwhile knowledge, about the big things, the real things. Basically, we live a short disappointing life; and then we die. We fill up our lives with shite, things like careers and relationships to delude ourselves that it isn’t all totally pointless.

How many shots does it take before the concept ay choice becomes obsolete?

It's different in Scotland. People who come to readings are more interested in literature as such, but the readership in general is really quite diverse. It's a cliche, but it's said that people who read my books don't read any other books, and you do get that element.

People even split up by text message, they dump each other by text. Everything seems so disposable, so throwaway, but you have to engage with that if you're writing about the modern world. You've also got all these pop references that you feel obligated to make. They're just part of the bricolage of the whole thing, whether or not these are actually significant elements themselves.

I'd always done a lot of sniffing glue as a kid. I was very interested in glue, and then I went to lager and speed, and I drifted into heroin because as a kid growing up everybody told me, 'don't smoke marijuana, it will kill you'.