As I mentioned recently , not everyone is a writer - but plenty of people would like to write a book. I've had over 50 books commercially published, so thought it might be useful to do a short series on the essentials of writing a non-fiction book and getting it published. See the end of this post for a summary of the series. In the first part of this series I looked at deciding whether your idea was really a book - to do this I recommended listing around 10 headings that would set out your basic structure. Now we're going to flesh those out. What we'll get is the biggest part of a book proposal - the document you send to a publisher to sell your idea. It's also extremely valuable once you starting writing the book. What you will do next is, for each heading, fill in some detail. I'm going to show you two ways to do this - but before I do, I ought to warn you that putting together the outline is the hardest part of writing a book. It can be agony. If you do it pro...