Hey, love the game!
I just wanted to say here that in my gameplay of the version 1.5.5, Gabe's quest won't progress, even if I go study with her twice and get everything right, the books keep showing that I should go study with her, and if I go there again, the scene with the questions about the demon wars is repeated.
I haven't actually tested it, but I believe that if the game doesn't recognize that I advanced with the studying part, the test won't happen.
To end my note, just a quick reminder that this game is amazing, sincerely the most entertaining game I've played in years. I feel my heart sink everytime I finish all the storylines and the updates are the only avoiding my mental collapse.
Thanks for being such awesome developers.