I have written more than 100 novels and novellas since 1983 - I was first published in 1985. There was an overlap of three years with my teaching career, but finally I felt good enough about my writing career to quit teaching and write full time.
I think I wrote 'The Trysting Place' in about three weeks. But it was inexperience that made me have to do that. I didn't feel good about the book all the time I was writing it. It felt a bit like wading through molasses.