Mammoth Books presents Featherweight

I don't like writing at home much," admits Shearman. "Home is a place for sleeping and eating and watching afternoon game shows on TV. There are too many distractions. So, years ago, I decided I'd only write first drafts in art galleries.

"And the best of them all is the National Gallery, in London, a pigeon's throw from Nelson's Column. I can walk around there with my notebook, thinking up stories - and if I get bored, there are lots of expensive pictures to look at. Perfect.

"A lot of those...