The A-Z Book of Sexualities and Genders (And All About Them)

This book will give you a look at many sexualities and genders, way more than gay, straight, and bi, and more than male and female. It will also give you some tips about coming out, as well as some "trying too hard to be funny" anecdotes.
Feel free to message me/comment if I've passed the letter of your sexuality and still didn't mention it.
All of my information is from websites (mostly Wikipedia) and I'll leave the links in a huge chapter at the end.