Modpack version
E2:E 1.67

Can the issue be reproduced?
Yes

Issue
The bibliocraft bookcase is designed to accept books. It can accept most books. It won't accept "On the Dynamics of Integration", the Dynamic Integration book/manual.

The change needed to the bibliocraft.cfg file is described here: https://www.bibliocraftmod.com/wiki/bookcase/

It's likely you'd need to add 'dynamics of integration' as a single keyword rather than just 'dynamics' to avoid enabling the whole mod to go in there, but that's just me guessing.

I'll get that fixed, thanks :)

not sure why but i just forgot to merge my changes into master for a solid 4 weeks, anyway this is gonna be solved in the next release ^^

Nice one :P