While this book should never be read in place of someone's firsthand experience with transitioning, I believe it supplies a very nice complement to the subjects that come up, especially for someone intimately close to the person transitioning.
Jo Green offers a look into subjects facing the partners of trans people, including dysphoria, coming out, sexuality and gender (and how your own identities may shift), loss and grieving, as well as the nitty gritty of social, medical, and legal transition.
I will say that because Green is writing from a UK perspective, I wasn't sure how much some of the medical & legal information given would apply to American (or other) people, especially considering we do not have socialized medicine.
The format for much of the book is information and/or context given in short paragraphs, alternating with longer personal anecdotes from many interviewees. While I appreciate interspersing a more personal touch, I occasionally found this to be jarring and lost the thread a bit--I didn't always feel the personal essays chosen related *directly* to the paragraph above it (though they were certainly connected to the general topic), which made reading it feel a bit jumpy.
Overall, I'm so, so glad this exists as a resource. Green is incredibly thoughtful and specific in the way they write about trans folx from the first page, and shows a lot of compassion for both trans people and their partners.