David Tremain was born in the UK and studied art at Medway College of Design, Rochester, Kent and paper conservation at Camberwell School of Arts & Crafts. This was followed by work at a London art gallery, and in Reading. He later emigrated to Ottawa, Canada, and retired from public service in 2010. He has written book reviews for the Canadian Association for Security & Intelligence Studies (CASIS) and is an expert on Second World War spy cases. He has published three books on the subject: Rough Justice (2016), Double Agent Victoire (2018) and The Beautiful Spy (2019).