Brian here are some marxist and radical texts on homosexuality.
http://www.press.uchicago.edu/cgi-bin/hfs.cgi/00/7094.ctl
Against Nature : Essays on History, Sexuality and Identity by Jeffrey Weeks Homosexuality: Power and Politics by Gay Left Collective Mario Mieli's book 'Homosexuality & Liberation — Elements of a gay critique, http://www.endpage.com/Archives/Subversive_Texts/Mieli/Towards_Gay_Comm.htm
Queerly Classed, " ed. by Susan Raffo / Paperback / South End Press
Translator of Marx and Lukacs, David Fernbach, "The Spiral Path. Boston: Alyson Publications, and London: Gay Men's Press.
Virtual Equality: The Mainstreaming of Gay and Lesbian Liberation by Urvashi Vaid Homosexual: Oppression and Liberation, Angus & Robertson (New edition, 1993, New York University Press) by Dennis Altman.