from the publisher website
Mastering the Vault is a short (24 page) guide for gamemasters of The Whispering Vault. Within this PDF GMs will find advice written by Nigel Findley (author for such popular game lines as D&D, Vampire, Mage, Earthdawn, GURPS, and Shadowrun), a timeline of events, a short hunt (also written by Findley), and a short piece on Unbidden as player characters.
Fully illustrated and ready for printing on your home or office printer, Mastering the Vault is the perfect supplement for gamemasters of this cult-classic roleplaying game.
Source: The Publisher Website.