So Everlasting World Library would be something along the line of "Karaz-Kron a Karak Nakarak"? I don't know if "a" can be used as "of" or if there's a better word. But Everlasting Library of the Mountains and the Rest of the World has at least some appeal to me. As does Pile'o'books for Mountains and non-Mountains.
Honestly, one thing that complicates this is that the word for book/record/history/chronicle is the same as the word for library/archive/knowledge. It's as if you had the same word for big rock (kar) and mountain (karak).
@BoneyM What would words like "kronag", "kronak" and "kronaz" mean?
I guess kronak actually means the concept of book, and thus puts an emphasis on it's interpretation as capital K Knowledge.
Kronaz would probably mean either "no really, just this one very important book" or "unshakably booky", the latter of which might have value for our naming dilemma.
As for Kronag, I don't actually know. I know that Karag means both barren mountain/volcano and something along the lines of lesser or dependent or partial Karak. But I don't know why or what the -ag ending generally denotes.