small blue-green world is a small publishing venture working with leading IT security specialists and professionals, mainstream publishing houses and technical authors to educate and inform those involved in the IT security of best practice in the enterprise.

David Harley CISSP is the company director and began small blue-green world in April 2006. when he left the service of the NHS in the UK, in order to focus on writing, publishing and consultancy.

He has worked in IT since 1986 - in application and network support, system administration and since 1989 in IT security management. While specializing in virus and email abuse management, he also holds qualifications in general security management, service management (ITIL), security auditing and medical informatics. He was formerly manager of the National Health Service's Threat Assessment Centre.

David is a prolific author, and an experienced technical and general editor, reviewer and proofreader. He is the author and editor of the "AVIEN Malware Defense Guide" 2007: check it out! and joint author of "Viruses Revealed" 2001, and has contributed security-related chapters to about a dozen other books to date. He joined the Research at anti-malware vendor ESET LLC in 2008.