Cory Doctorow joins us tonight on one of his surprisingly frequent visits to Canada. The UK-based writer joined us in Waterloo during the Quantum to Cosmos festival. He  made an appearance on the Agenda, and also gave this talk which is a great backgrounder on his involvment as an activist in the field of copyright, fighting the copyfight. Once you're up to speed, come join tonight's livechat at 8 p.m.

Take a look: