Oh my goodness, the boss fight is so much tougher than the rest of it. Still, I persevered and made it to the end with all the books. I'm impressed at how much high-quality game you managed to cram into a Pico-8 format. I was briefly confused at the point where you have to jump up through a platform to a lever; I somehow didn't realize I could jump through it at first.
It's nice to see that Snail-chan is still having magical adventures!