Originally Posted by
Lambda
Actually the monsterbook isn't supposed to show all the monster by default, there's code in the matchserver that restricts the monster book to only the moster you've meet so far in the quest, for example if you've never played quest and play it for the first time, you will unlock the monster info for the goblin gunner and the monsters of the level 1 quests.
If you kill a boss then you will unlock the info for that boss. Anyway for some reason maiet didn't finished it and its disabled by default.