How Do You Know What To Write About?

I continue here my thread on how I go about writing a trade book for general audiences. So far I have talked about how I start with reading about the topics of relevance. When I’ve done a lot of that I eventually get to the point where I realize I’ve read all the major works that I need to have read in order to have a good sense both of what others have said about a topic and about what I have to say myself.

Maybe I should pause a bit – for a post or two — on this question of “what I have to s...