Strata: a Spire sourcebook
Grant Howitt & Christopher Taylor
Spire RPG (3)
Spire: The City Must Fall
Christopher Taylor & Grant Howitt
Spire RPG (1)
Sin layout
Jay Iles
Spire RPG (2)
Magister's Guide
Spire RPG (4)
Black Magic
Spire RPG (1.10)