You can find a non-comprehensive list of First Amendment study aids we have in print at this link.
Texas Law students can find a list of electronic First Amendment study aids available through the West Academic Study Aids Online Collection at this link. (If prompted to "Find your institution," type in "Tarlton" and choose "The University of Texas at Austin - Tarlton Law Library." You may have to log in with your UT EID and password.)
These books are written for a student audience. To get a list of treatises providing a more in-depth treatment, please consult Tarlton's Guide to Legal Treatises by Subject.