Apocalyptic Pirates
2 books

Doomsday Hunter
1 book

Dungeon Master
8 books

Human to Dragon to God
7 books

Looting the 13th Floor
2 books

Lottery King
6 books

Making Monster Girls
2 books

Metal Mage
11 books

Planet Broker
3 books

Succubus Lord
14 books

Summoner
13 books

Without Law
10 books

Books not in a series
6 books