Having just finished writing the eighth in the DI Horton series, which is now with my editor, there was no time to rest on my laurels but it was straight on with researching the next DI Horton. I finished DI Horton number eight (I’ll reveal the title soon) on 31 January and since then I’ve been working on the next Horton novel. I now have a rough plot outline, and I mean rough, and some character…