Over three years old and it’s still invaluable – Andy Clarke’s Contract Killer: The Next Hit makes sure you cover your arse when working with any client on a Web project.
It’s kindly published under a Creative Commons Attribution Share-a-Like license so free for your use with a little credit back. Also worth nothing Andy is by no-means a lawyer (but does fancy himself as a top detective) so make sure you get legal advice if you want to be 100% sure.