The plot is straightforward but enjoyable. Chapters alternate between the present (high school politics and living with her dad) and the past (transition angst and living with her mum). The characters of her parents are especially well-drawn, each with their own tangles of development and motivation.
After the story ends, the author adds two notes: one aimed at cis readers, about understanding trans issues, and one aimed at trans readers, to encourage them and show them some options. I think this is a grand idea.
The only serious fault I find, and it's a fault acknowledged by the author in the endnotes, is that the protagonist has too few problems with transition: she gets hormones easily, she has a girlish build, and she gets bottom surgery earlier than would normally be possible.
There are perhaps too many books about trans people where much of the plot is about them being trans, but they serve a useful function in educating and encouraging (as well as entertaining) and this book does all three.
Strong content warnings for transphobia and bullying, of course; one scene has a graphic suicide attempt; reference to a successful suicide; attempted sexual assault; firearms; soft drugs; no actual sex.