The GAG book outlines the steps to taking a business to court. I'll try and make time to include those here. But until then this link is a source for identifying lawyers in your state who specialize in handling issues related to the arts: http://www.law-arts.org/ I think it's also good practice to just know your rights as a worker in general here in the U.S. http://www.dol.gov/elaws/ Make Joe Strummer proud and learn those.