http://dothack.wikia.com/wiki/Monsters# ... 2_Monsters
Here you can find the list of monster in GU vol. 1 but keep in mind that the name might be alittle different. Also if any one knows where can I find the following monsters.
Ogre
Apititer
Supernatural
Zan Juggler
Plant
Elder Growth
Beast
Bravo Nose
Rue Ziger
Don Elephant
Machine
Metal Fist