Labor and employment law is an extremely broad area including all facets of an employer/employee relationship. There is an exception to that in labor and employment law – and that is the negotiation process covered by labor law and collective bargaining.
Labor and employment laws consist of thousands of federal and state statutes, administrative regulations, and judicial decisions. The area is so vast you usually need a lawyer to help you sort things out. But if you want to try researching labor and employment law yourself, you can always take it one step at a time.