It is a question I keep getting asked and it is interesting. It takes so long to write a book (how does Anne Perry do it?) and yet to read it is fast. The good news for me is that the second book in this series is coming along much faster than the first.
The first, Needled to Death, took about 6 years though it was very much on and off. I started writing it because I thought I had this cool idea and some time on my hands and then I got bored or at least interested in other things and it languished. When I came back to it I had to rethink the plot, play with the characters, change the setting, in fact over the course of the years the whole book changed 3 or 4 times. When it finally looked like it was going to hold together, the trouble started. I gave it to my father to proof. His idea of proof reading is to light a stick of dynamite and see what's left. He didn't proof, he re-wrote, extensively. Eventually I cut him loose and dedicated the book to him with the recommendation that he write his own.
With the second book, French Roulette, I already had the idea before the first was finished. I'm into the 2nd re-writing now and am confident that I will be within my goal of 'one-book-a-year' publishing schedule.