I've been very interested in turning a fan fiction I did with several other people into a book (and remove all the parts that broke copyright law, leaving only the original story). I have a couple of hurdles though. First, its technically an illegal derivative work. Do my friends and I own the work sans the copyrighted parts, or does the copyright holder own the work. Second, do I need to get my friends to put it into writing that I can profit off of their characters and story, or will a simple "Yes you can do this" over the Internet work? Third, does the person who own the site or server we worked this on own the copyright to the original fan fiction?