Q1: I took up writing when I sold my computer services business in the early 2000s, having always had an ambition to be an author. I have so far written 5 books in the DCI Frank Merlin World War 2 detective series. The four published books are Princes Gate (set in January 1940), Stalin’s Gold (September 1940), Merlin At War (June 1941) and A Death In Mayfair (December 1941). Merlin At War was nominated for a CWA Dagger in 2018. My aim is to continue to follow Merlin’s adventures through to the end of the 
Q2: The book I am promoting now is the 5th in the series, Dead In The Water, which will be published by Hachette (Headline) on May 19th. It is set in August 1942 and revolves around two artistic masterpieces stolen from an Austrian Jewish family before the war and which end up in London with fatal consequences.
Q3: As I am writing a historical series set in a specific period, my principal framework is the timeline. As you can see above, all books are separated in time by 6 to 9 months, so when I finish the latest I know roughly when the next one will be set.When I’m starting work on the new book, I focus intently on the exact time slot of the story. I research that heavily and that process often prompts plot ideas. I am already working on Frank Merlin 6, which I have decided to set in Spring 1943, and plot ideas are beginning to occur to me. When I have roughly formulated what ideas to pursue, I just start writingand see where they take me. I usually do not know who did what until I am about two thirds of the way through the book. I write a first draft straight off without stopping to edit. Then I do many edits before sending the manuscript off to the publishers. I did about 15 edits of Dead In The Water which is about the norm.
Q4: As is clear from above, I am not really a planner. I rather think of myself as a sculptor, except that I don’t have a piece of stone or marble to work with. My first draft is the working material. Once I’ve created that I start chipping away.
Q5: The word count of the new book is approximately 110,000. The word count of my first draft was over 200,000 so you can see a significant editing job was done. My plots tend to be quite complex and I don’t think I could manage anything much shorter but I think 110,000 to 130,000 is a good length for a thriller.
Q6: I am conscious as I write my first draft of teeing up various characters and situations but as I say don’t formally plan a structure in advance. After a while, I tend to find everything comes together in its own way. I seldom make major structural changes when I get down to editing.
Q7: I find writing the first draft very hard work. Also waiting for comments on the submitted manuscript is tough.
Q8: Editing is good fun. Also I love creating a fictional world all of my own and then sharing it with my readers.
Dead In The Water by Mark Ellis is out now in paperback by Headline Accent, £9.99.