Shrapnel, if you could wait a week, my newest tournament (so new, it's not even done yet) featuring newer versions of some books mentioned in the ABK tournament above, will be finished. It will take a week since there are many contestants and the time control is 15 minutes. This is in contrast to the 5 minute or 3 minute games many people play, and in my opinion, longer time controls show which the good books really are. There are many tactics people use to win at short time controls with an inferior book. Either way, this means my tournament will take longer than my traditional three-days-and-I'm-done kind of thing. Patience is a virtue.
The sign up thread is here, and the books are just getting revved up.https://www.chess2u.com/t4866-get-ready-for-abk-book-bash-2#28317
Cheers, and hopefully my tournament will provide the answer you seek.