Mark O'Neill

Mark O’Neill is a Scottish-born author and independent publisher based in Germany. A former journalist and technology writer, he is the founder of Glass Dagger Press, a multilingual publishing house producing political and espionage thrillers in English, German, French, Spanish, and Italian.

His work is recognised for its realism, disciplined pacing, and uncompromising portrayal of power and corruption. Through series such as Department 89 and other international titles, O’Neill has built a reputation for intelligent, cinematic thrillers that combine moral tension with relentless momentum.