If you have done homework #3 before version 16.0, then it is impossible to get the right book from the librarian. This bug was identified a long time ago, but for some reason the developer does not fix it. Start the game again.I know, but how do I complete the Brenda quest then? For him, you need to increase the charisma. To increase charisma, you need to talk with a librarian or teacher, but there are simply no dialogues with them.