I'm pretty well into this book
but am stuck on the quaternion operations (slepr, squad, exp, etc.) and the like and want a good book that backs it up in regards to making it a bit more understandable. I've seen these books
and am wondering if anyone has suggestions.
I am postponing understanding them fully until later so I skipped the chapter, but want to have a good backup in-case I need a second opinion on another area.