Well, it would have been nice for those books to be returned, so that I could have loaned them out again to another beginner. But as far as the real "keeper" book as the companion to that set, I still have on the shelf, "Examples", which is mainly photo reproductions rather than text. Of course, I have certain big coffee-table books of AA too. But having seen so much of his work in person, and even having once shared a big retrospective with him, I rely mainly on memory concerning his actual print quality. Some of of my favorite images of his have rarely if ever been reproduced in book fashion.
Otherwise, I'm glad to have learned the Zone System, though it's now way behind in the rear view mirror. It remains in my tool box, somewhere down in there, if I ever need it. Zone-speak is also a helpful common-denominator lingo on forums like this one. It's certainly a lot more specific than simply referring to "pushing" or "pulling" film development. But there is no reason to make a kooky religion out of the Zone System, like Minor White did.