Right, only one side of the connection needs an open port (and most clients will let that be either seed or leech side)… this is why having an open port on your end is useful if you’re downloading, since you can download from seeders that don’t have an open port.
worldcat lists the institutions with this book https://search.worldcat.org/title/1048005393, you’ll probably have to show up in person. You may be able to do an inter-library loan if your local library doesn’t have the book, you could get it from a sister library. However, the only public library that lists having the book is the Austin Public library in Austin, Texas.