Crypt of the Vampire

From the back cover: In the dungeons and catacombs beneath a lonely mansion you confront the evil vampire, Lord Tenebron, his guardians and servitors - creatures of darkness, adventurers enslaved by his fiendish will and hideous undead monsters that seek to slay you. Despite the terrible dangers you must prevail and battle your way to the very deepest chamber of the crypt, for only you can destroy the vampire lord and end his reign of terror for all time! Golden Dragon Fantasy Gamebooks #1