12 June 2017
When Keith Houghton bought his four-bedroom detached house earlier this year, he did a rare thing for an author: he paid cash, with earnings from his books.
Keith who, you may ask? Houghton is one of a handful of so-called "hidden" bestsellers: his self-published crime thrillers are ebooks, sales of which are not monitored by the UK's official book charts (if they don't have ISBNs, which self-published titles often don't).
