Noir focuses on the criminal mind, not a whodunit: more why they did it and will they get away with it. The abnormal psychology is what fascinates me rather than the puzzle-solving aspect.
A number of people have read 'Two-Way Split' and made certain assumptions about what the author's like, and I'm highly disappointing to them. I don't drink, I don't eat meat; that's very disappointing for a hard-boiled writer.
I try not to think about writers who came before me when I'm writing myself. If I did, given the abundance of literary talent Scotland - and Edinburgh in particular - has bestowed upon the world, I wouldn't be able to get as much as a sentence written.
It's possible to be hard-boiled and not noir, just as it's possible to be noir and not hard-boiled. And it is possible to be both. People debate endlessly what is hard-boiled and what is noir.
Maybe it's the buildings, maybe it's the weather, but you can see it affects us - that Scottish gallows humour; our tendency towards bleakness, to look at things in a negative way. Those definitely come out in my writing.
Writing books that people want to read is helpful - my most successful book is my only police procedural, a very popular subgenre of the very popular crime fiction genre.