[Every Wednesday I’ll recommend one of the blogs I follow. Yes, I still follow the best of the best using a feed reader. You’ll be able to check the list @ this blog’s header.]
The Public Domain Review is one of my favourite blogs. They create and curate collections of books, films, audio and others that are in public domain, providing the context of the work. They also have essays related with chosen public domain works. Last year, they published a (wonderful) book with some of those essays. The Public Domain Review is a project from the Open Knowledge Foundation. If you can, give them your support.