This book helped me understand the kinds of things that transgender people deal with. It also made me realize that it's practically impossible to generalize about transgender people, since generalizing would require making assumptions that are most likely untrue of any given individual. For many people, gender is not binary, it's fluid or it's on a spectrum or it's standing on its head or it's complicated. Transgender people endure a great deal of misunderstanding, hostility, ridicule, stigma and discrimination. They stand where gay and lesbian people stood a generation or two ago. I think this is one of those cases where 'if you're not part of the solution, then you're part of the problem,' so I would recommend it to anybody who wants to be part of the solution.
All that being said, the book's target audience is people who work in a therapeutic capacity with transgender people, which is not me. I learned a lot from it, but would have preferred a book with a more sociological slant. I also think the book, which was published in 2004, could use an update.