Last night I went for dinner with some friends and some of their friends. I ended up talking to a man who I hadn't met. I found out that he was also an IT contractor and had worked in many of the same places as I had.
He asked what my speciality was and I told him that I specialised in open source technologies like Apache and Perl. He told me that his brother had written books on Apache and Perl.
Turns out that his brother is Peter Wainwright.