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.

I still think most writers are just kids who refuse to grow up. We're still playing imaginary games, with our imaginary friends.

I don't think I have one particular favourite writer. I have many whose works I will always buy or reread - Muriel Spark, Anthony Powell, Robert Louis Stevenson, Ruth Rendell, James Ellroy, William McIlvanney, Kate Atkinson, John Burnside, Louise Welsh, Iain Banks.

Was it all inevitable, John?" Reeve was pushing his fingers across the floor of the cell, seated on his haunches. I was lying on the mattress. Yes," I said. "I think it was. Certainly, it's written that way. The end of the book is there before the beginning's hardly started.

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.

It was the laughter of birthdays, of money found in an old pocket.

Right from the very beginning, I knew I wanted to write palpably Scottish fiction.