Why am I having so much trouble finding a focused book idea or common thread for my book? Why is this so important?

As I mentioned in a previous post, I have written a lot of useful material over the years, I did a month-long outline course online in November, collecting another tens of thousands of words, and I started writing a couple of “real” chapters the previous weeks. All without that needed theme to tie it all together. Why don’t I keep plowing through all the content and forget about that supposedly important theme? Continue reading