Look everyone, I hate to be a nagging nightelf about this but please DO NOT open mysterious books you find lying on the ground, entombed in a forgotten dungeon, or otherwise cannot establish the provenance of. Same goes for scrolls, runes, tablets, and any freestanding platonic solid. You do not know what ancient or modern magicks, energies, or curses might be imbued on that thing, so please just bring it downstairs and we can take a look at it safely.
