It's the technique, I think, of writing a novel that is difficult for a nonfiction writer.
In addition I wanted to write a Southern novel, because I'm a Southerner.
I had reached a point in my career in which I was ready to try something new in my writing, and the idea of a novel has always been in the back of my mind.
In science, you really do need to have a purpose-driven life. You will succeed to the extent that you get the most out of your career so that you can give the most back. Try to be an addict, driven to achieve discoveries, learning new things, and then writing about them.