I love short stories - reading and writing them. The best short stories distill all the potency of a novel into a small but heady draught. They are perfect reading material for the bus or train or for a lunchtime break. Everything extraneous has been strained off by the author. The best short stories pack the heft of any novel, yet resonate like poetry.

You wouldn't think you could kill an ocean, would you? But we'll do it one day. That's how negligent we are.

At all times, think like a writer, and keep those antennae twitching - that way, you pick up new ideas.

From this height the sleeping city seems like a child's construction, a model which has refused to be constrained by imagination. The volcanic plug might be black Plasticine, the castle balanced solidly atop it a skewed rendition of crenellated building bricks. The orange street lamps are crumpled toffee-wrappers glued to lollipop sticks.

I started writing novels while an undergraduate student, in an attempt to make sense of the city of Edinburgh, using a detective as my protagonist. Each book hopefully adds another piece to the jigsaw that is modern Scotland, asking questions about the nation's politics, economy, psyche and history ... and perhaps pointing towards its possible future.

It seemed to him a very Edinburgh thing. Welcoming, but not very.

I'm often asked how I write books, but I don't think my approach is suitable for everyone. If I walked into a creative writing class, all I could say to them was 'I tend to make it up as I go along.' I'm not sure that's brilliant advice.