Q:
Tomes of Knowledge
A:
https://www.guildwars2.com/en/news/updating-your-wallet/
“Tomes of knowledge will level you up if you are under level 80 and give one spirit shard if you’ve reached level 80.”
So, essentially they will keep their same functions.
Be careful what you ask for
ANet may give it to you.
ANet may give it to you.
I’m pretty sure they’ll still be around. Tomes of Knowledge will only be usable on characters below 80, though, so you won’t get the extra skill-points from them if you use them on an 80, like you can now.