Berkley-Pacer Feb 1987 paperback edition

Fantasy role-playing at its most exciting. Imagine you are Grey Star, the wizard, embarking on a perilous journey to The Forbidden City. Your magical powers protect you, but the power of the Wytch-king threatens . . .

Grey Star is in another plane, the Daziarn. A realm of nightmares and ghosts await our hero, who must battle the fiendish enchantments of the Black Crystal Tower, the Chaos Lord, the ancient god of discord, the Neverness, holes that lead to the past and future that never was and never will be, a mountain that moans, and other twisted foes before the final to dive into a shimmering lake - to another dimension, and fight his shadow twin in a duel for the Moonstone and human's salvation. From the magnificent flying Ethetron to a terrible lizard that turns those who look at it into stone to the mysterious Room of the Mirrors. A fine feast of action sci-fi.

The reader's decisions will determine whether Grey Star, a young wizard, can return the Moonstone and destroy Shasarak, the renegade wizard