Start with high-confidence rpgs & tabletop books, then narrow by subgenre or adjacent topics.
SIMSOC: Simulated Society, Participant's Manual
William A. Gamson, Larry G. Peppers
The Steampunk User's Manual
Jeff VanderMeer, Desirina Boskovich
Critical Role: Der Katzenprinz & Other Zemnian Tales
Liam O'Brien, Charlie Borovsky
