Larian Studios Forums Beyond Divinity (English) Help/Tips/Tricks How do I find that summoning battle strategy book?

I have NO idea what to do.
I've completed the first test, and need some sort of a summoning battle strategy book in order to start the second test, except no one really knows where it is.

All tracks seem to lead to that Raanan that some suspect is selling those drugs, (at least, I think it's him, but if it's not, don't tell me and spoil the surprise) and some warrior tells me he has been talking to some imps, but the only Im I can talk to is that alzaimer one, and I can only talk about the drugs.

I sure could use a hand, right now.

Did you talk to Tax? And get a certain key? And the most important thing => did you speak to student Dotharhar in Belehram's room? (Specimen woman)