1. Turning your idea into a bookWith non-fiction books the question of whether or not to write one has to be a business decision, rather as you would take over any new product or service.With general non-fiction there is usually room for a good new book on the market, provided it's likely to attract a substantial group of readers because:·It's about something entirely new and very interesting that no-one has written about before, or...·It's about something that's not new, but to which you contri.