Search the Library

You take a look around at all the books and think surely there must be some secret hidden in this library. You peruse the books, attempting to avoid the currently distracted eye of Hades. Huh, there's a lot of odd titles here. You open a few of them perusing through them. Seems there's also several from other languages here as well. You see one that has funny characters that just look like squiggles. Slightly evocative of Infernal; except where Infernal has letters that have open space, these characters are crowded together, elegant forms near-dancing on the pages.

Another book is written in a language that looks vaguely similar to Celestial, but this time the letters are a bit more blockish. You think you can start to make out some of the words however, but the pronunciations simply don't make sense. Did this language somehow borrow its alphabet from Celestial or something? As you continue perusing the books you nearly get lost in the strange languages of some of them, until you find a four-number sequence on the inside cover of one of the books: 4971. Huh, you suppose that's probably what you're looking for. Better remember it.