I just received my leather book! I only had enough time to take it out of the box and I'll just say it looks amazing.
This should answer some questions. One, I didn't order my car, so everyone who buys should get the book. And two, I've had my car for almost exactly 4 months so maybe that will help gauge when others might get theirs.
Like the car it's worth the wait! The cover and book are so nice I don't even want to touch them, lol!