From the book's Amazon page:
Norah Vincent’s New York Times bestselling book, Self-Made Man, ended on a harrowing note. Suffering from severe depression after her eighteen months living disguised as a man, Vincent felt she was a danger to herself. On the advice of her psychologist she committed herself to a mental institution. Out of this raw and overwhelming experience came the idea for her next book [Voluntary Madness]. She decided to get healthy and to study the effect of treatment on the depressed and insane “in the bin,” as she calls it.I haven't read "Self-Made Man," but I have never understood how it was supposed to represent the actual experience of being a man, when it also involved the disturbing and weird experience of misrepresenting yourself to everyone.