A full-time writer since 1980, Mark Zuehlke had published several hundred magazine and newspaper articles before turning in the early 1990s to primarily writing books. He has since established himself as a prolific non-fiction book author and more recently as a novelist.

Currently he focuses mostly on writing military history, particularly books regarding the experience of Canadians at war. But to keep from getting too narrowly focused, he is also publishing a mystery series, writing other fiction, ghost writing, teaching writing workshops, and doing some consulting and research work.