Arlorns Bibliothek (Arlorn's Library) is a fantasy campaign setting for the Osiris Rollenspiel.
It describes the lands and cultures of the setting which are a fairly standard set with a few innovative twists:
- Western-medieval baronies
- Asian-inspired lands
- Arabian/african-themed desert countries
- Two dwarven kingdoms, one of sea-faring dwarves loosely based on early medieval Britain and Vikings
- Two elven cultures: wild elves and night elves. Other than the standard fantasy elves, the elves of Arlorn's Bibliothek have a pair of wings and are capable of flight.
Each culture comes with character templates that depict typical occupations of the given culture.
The book also contains new fantasy skills, fantasy weapons and a short bestiary.