I read an advance copy a few weeks back and highly recommend it. Clearly and engagingly written, in a calm and straightforward manner (there's no need to sensationalize how bad things are) it gives a good picture of the situation of gay men in Arab countries (focusing on Egypt, Lebanon and, to a lesser degree, Saudi Arabia).
There's an interesting discussion about the religious basis for discrimination against gay men. I don't know enough about Islamic texts to comment, although it does strike me that if there no basis in the Koran to condemn homosexuality, that is not the general interpretation.
The idea I found most interesting is the way that discussions of homosexuality in the Arab world have gotten caught up in nationalist frameworks--homosexuality nowadays is condemned as a form of Western decadence (whereas Whitaker points out that not that long ago gay Europeans used to escape discrimination and come to enjoy sexual idylls in the more tolerant Middle Eastern societies). In much the same way, feminist ideas nowadays are sometimes rejected as Western imports, in the name of an often fictitious cultural authenticity.