Hmm.

I'm getting the feeling that some people think that homosexuality is a relatively new phenomenom. I'm also getting the feeling that some people think that its a phenomenom that only applies to white people. I'm not surprised, based on the fact that for much of history it has been considered weird and wrong. A great deal of oppression and suppression was the result of that. So, a couple, make that several, history and current affairs books:

Homosexuality and Civilization.

Unspeakable Love: Gay and lesbian Life in the Middle East

The love of the Samurai: 1000 Years of japanese homosexuality

Genders, transgenders and Sexualities in Japan

Islamic Homosexualities:Culture, history, literature

Boy-wives and Female Husbands: Studies of African Homosexualities

Male daughters, female husbands:Gender and Sex in an African Society

Colonalism and Homosexuality

Queering India: Same sex love and eroticism in Indian Culture and Society

The man who was a woman and other queer tales

Tritiyaa-Prakriti:People of the Third Sex

Homosexualities

Two-Spirit People: Native American Gender Identity, Sexuality and Spirituality

The Changing Ones

And just for fun:

Biological Exuberance: Animal Homosexuality and Natural Diversity