Tight Gas ReservoirsStephen A. Holditch, John Paul Spivey, John Yilin Wang · First published 2020Open the Tome
Call of Cthulhu Starter SetChaosium Inc, Mike Mason, Paul Fricker, Gavin Inglis, Mark Morrison, John Sullivan, Keith Herber, Chris Spivey, Dan Kramner, Sandy Petersen, Lynn Willis · First published 2018Open the Tome
