The quality of the physical Eorzean Encyclopedias is actually really great. The paper is heavy and printed in full color. The binding has a matte coating on most of it, that makes it almost look and feel like leather. Only the embossed crystal is shiny.

There's also a bit of a bestiary for hunt monsters, although it's not centralized. And of course, the FATE text boxes often have a bit of info about the monsters involved. (There's a lot more Voidsent lurking around in random places than I realized. )