My very first published book was Non-Fiction: my thesis. I didn't mean to write it (accidentally I applied for the right job at the right time with the right qualifications). Now I have a useless title. "Overqualified" was the ugly word used to describe me when I applied for jobs. When my daughter was born I promised myself that I'd never write Non-Fiction again.
Hah! Never say never. Hardly seven years later, I have been convinced to write another one. Since I have many more ideas about what I could write, I assume that this section will grow too, eventually.