Cool idea involving all Monsters in the game!

When I was doing the Atelloune Quest for the leatherworker Class that donned on me that it would be really really cool to have a monster book! I was thinking the more you fill up the monster book the better the rewards! This would involve all monsters outside and inside dungeons, this also includes anything that could only be found in Boss arenas as well. Also if I'm not mistaken not all creatures have a in-game description (some only limited to cards), so that would be really nice to have.

To take it further, maybe have the Leatherworker have something extra to do by crafting Taxidermy versions of the creatures. Though I would imagine that would depend how much people would want something like that. Also if Yoshida were to ever add Blue Mage, I believe the Monster Book could help identify skills the Blue Mage class has yet to pick up.

By the by, I think this type of topic might be in the wrong section? Apologies if so.