ISSAP- study group? tips?

GarudaMin

Do we still have ISSAP study group? Any other tips for studying and exam (aside from existing posts - well if you want to re-post here, that's fine too)?
Also if you have taken, do you recall % of questions based on official text book? I think I am allowed to ask that without violating NDA. I just wanted to know how official the textbook is. I have second edition and I feel that the word 'official' means it's printed by ISC2. Not 'official' for the ISSAP exam, since it doesn't cover the CIB.
Thanks.