This is a great reference book on the non-binary genders. Most of the content is presented as data and then explained as opposed to using an expository or persuasive writing style. Given the prejudice and violence that is common towards “out” members of this community, the samplings are not huge and the population size has to be speculated and estimated. Hopefully, we will come to a point one day where that will no longer be a problem and we can accurately count the members of this population, as with others. This would also allow a greater sampling and representation of their issues. Perhaps the government can add a fill in option or “Non-Binary” option to the census one day. One can hope.
If you are curious about what the non-binary genders are, their definitions, struggles and estimated populations, then this is an excellent book to pick up.