Responding to a critical need for greater perspectives on transgender life in the United States, Genny Beemyn and Susan (Sue) Rankin apply their extensive expertise to a groundbreaking survey—one of the largest ever conducted in the U.S.—on gender development and identity-making among transsexual women, transsexual men, crossdressers, and genderqueer individuals.
http://cup.columbia.edu/book/978-0-231-14306-6/the-lives-of-transgender-people
I heard about this - it sounds like it could be a little dry, but they clearly care about the subject, so I'm hoping that passion comes through in the writing.