Keigo Higashino

'[...] I understand writers are often late, but do they ever finish early?'
'I suppose. Writing isn't a purely mechanical operation. You can spend hours at your desk without writing a single page. But when inspiration strikes, sometimes it's hard to stop writing.'
'Was Mr Hidaka that kind of writer?'
'He was. Which is to say, I think most authors are that kind of writer.'