[header] How to write a fiction book [title] What do you know? [step] That is the first question you should always ask yourself because if you don't know about something, how can you write a whole book on it? [title] Think up an idea. [step] It isn't as easy as you may think. Every book starts with an idea. 
Something that works is imagining a really good beginning, asking questions about it, and sort of working out a plot line to go along with it. [title] Pick up a notebook and pencil, or get out your laptop, and brainstorm.