Well this took a sharp tone. I expected the change to happen a little bit later, but that's just a nitpick.
But ignoring this, this is a very great volume. It establishes new things, continues with the flow of the last volume and ends on a great cliffhanger.
I also like the new lore and mistery that was quickly established that makes you question of what happened before.
With how things are going i expect that it's going to be even more awesome then what was presented here. I'm greatly looking forward to volume 3
TL : DR
Great content! Keep up the good work!