I am trying to give the best performance possible in 400 pages. I want readers to be scared; I want them to be moved. Entertainment doesn't necessarily mean something trivial, but it does mean people wanting to get to the end of a book.

Having worked as both comedian and crime writer, the one thing I know is that both involve the delivery of a performance.

When I began to write, I was surprised at how little London had been used in crime fiction. Places such as Edinburgh or Oxford or L.A. seemed to have stronger identities.

I admire writers such as Elmore Leonard who can nail a character in three or four lines of dialogue, so he doesn't need pages of back story or clumsy exposition.