Mages and sorcerors, enraged at the wanton destruction of lost knowledge, declare war on that noble and that party and wipe them out. There is no where for them to hide.
The real Library of Alexandria was the friends we made along the way?
I assume this is where it ends, but if not..m well...
Iunno, I just get downhearted when the villains get captured and the MC party lets them go. I think 1 life for 1 book is a fair exchange, in this case.
This is what happens when you're half-assing your "help" and leaving partway through the job. Bro went to court, started a fight, made enemies and then just went home like nothing happened at all and expected everything to be fine.