Denis O'Connor trained as a psychologist and teacher. Throughout his career he taught in schools and lectured in colleges and universities. He is retired and lives with his wife Catherine and his two Maine Coon cats in a remote country cottage in Northumberland.
Marie O'Regan is a British Fantasy Award-nominated horror and dark fantasy writer. She has served as the chair of the British Fantasy Society, and has at times edited both their publications Dark Horizons and Prism. In September 2009, Simon & Schuster's Pocket Books imprint published her anthology (co-edited with Paul Kane) Hellbound Hearts, a collection of stories based on the original novella The Hellbound Heart by Clive Barker, that inspired the movie Hellraiser. Marie lives in Derbyshire, England.
Richard Ollard is the author of several books, including The Image of the King: Charles I and Charles II and Pepys: a biography.
Stephen Oppenheimer, author of Eden in the East, qualified in medicine from Oxford to begin a career in tropical paediatrics. He has spent 20 years working and travelling in the Far East and Pacific region and is a world-recognised expert in the synthesis of DNA studies with archaeological and other evidence to track ancient migrations. His first book Eden in the East: The Drowned Continent of Southeast Asia challenged the orthodox view of the origins of Polynesians as rice farmers from Taiwan.