So - now you're a writer. You've got your book deal and drunk the champagne. Congratulations. What next? Is this book going to be a one-off or just your first? If the former, don’t worry your pretty little head over things like repro, margins, PLR, bogofs, bungs and e-ink. But if you are serious about being a writer, you need to know a bit about the business. Your publishers will respect you more – or at least find you difficult to patronise – if you know what you're both talking about.