It's for general readership and is quite short, 175 pages including references and glossary. It's organised by each chapter being a debunking of a separate sex is not binary argument. Here's the contents page :

No. His chapter on DSDs is a Debunking of the 1.7% stat from Fausto-Sterling. He explains why the DSDs they use to get that number are actually either male or female to get down to 0.01%, which is discussed in the screenshots already posted.
Hopefully you can read this:

Here's the book, you should read it:

Here you go

Some people don't like the truth do they, Colin?

Why would anyone think transwomen are men?

Remember trans women ARE women. They're certainly not blokes, and it's not in any way a fetish.