Holy crap, 15 SR books. Well, I guess I need to save up then. Thankfully, all my useful SRs have gotten their books.
When you get to 4*, please pay attention to Gem cost as well, as that is a pretty big thing after the change. Please~

And yes, we really need to find out what the Awakening cost is... I mean, I can document it in two months when we get to Thor, but that's a biiiiiit of a wait.