From Halopedia, the Halo wiki
Stephen Cawood is a Canadian author born in South Africa. He wrote a number of guide books for the Halo game series.
Before becoming a full-time writer, Stephen worked as a Program Manager in the Microsoft Office Server group. He also received three patent awards for his work on web-based content management. While working for Microsoft, he had a chance to work as a Beta tester for Halo 2.
He left Microsoft in 2004 to marry his Canadian wife. After his leave, he went on looking around for some Halo strategy info to improve his game experience, he was shocked that there wasn't any great books or guides. Putting his experience at Microsoft to work he developed a strategy game book, The Unauthorized Halo 2 Battle Guide: Advanced Combat Techniques, that borrows from a number of books including combat leader's field guide, warfighting and Sun-Tzu's: The Art of War.
When it was released it sold 10,000 copies in its first three weeks on the shelf. He went on write The Black Art of Halo Mods (Sams), and Halo 2 Hacks (O'Reilly and Associates).
In his free time, Stephen enjoys playing water polo, squash and snowboarding. He also trains with a local Jujitsu and grappling club.