The author of the 560pp How To Be Gay pens a shorter piece in the NYT:
"To understand gay male culture as defined by style is to alter our sense of its meaning. That is especially useful when it comes to all those gay male styles that reveal some connection with femininity. Such gender-deviant styles make some gay men nervous, not only because they impugn their virility, but also because they recall those hoary Victorian definitions of homosexuality as a congenital abnormality involving a pathological reversal of sex roles — a mental illness.
"Instead of worrying that the feminine associations of diva worship, interior decorating or the performing arts may make gay male psychology look diseased, the real question we should ask about gay style is what its refusal of canonical masculinity achieves and what it enables its practitioners, straight or gay, to do."
Halperin's big book won't be released until late August. Until then, you have his previous titles to work through: