Found the issue. The filepath seems busted. There is a space to much after HELP and one too much before book 001. Also the file extension is missing (dunno if that can mess up things in that RPG Version).
View attachment 411047
No an error but strange. There is now a performance issue and texture warping to left of Lilias picture while moving. Once you press S it is gone.
Edit:
Tried to swap the savefile between a Patch2 and Patch3 game. The books work with P3, but the save saves the busted battle animation settings from P2. So no workaround possible here.