Shan - real name Darren O'Shaughnessy - became a full-time writer at the age of 23, and has since sold over 20 million copies of his books worldwide, becoming bestsellers in the US, UK, Ireland and elsewhere.
Why someone's sexuality needs to be public knowledge is not a question that will be taken up here, but what is relevant is that more celebrities and other public figures feel confident coming out as bisexual these days.