It is very easy to write a book that has too much content. This happens because the title is too general, the topic is too broad and the book that lacks any clear argument, angle or focus. What happens is that you literally write everything you know about a topic. As a result, the book you create is often boring to read and very difficult to finish because you keep thinking of something else to add. All is not lost, though, because cutting back the ‘everything’ book is surprisingly easy. All you have to do is make one key decision.