Erol Otus returns! The legendary TSR artist from the early 80s graces the cover of this retro style adventure, conjuring up nostalgic memories of great D&D adventures. In the Mysterious Tower, the characters are confronted with a perfectly preserved wizard's tower amidst the ruins of an ancient keep. The tower is surrounded by a force field, in which a vicious ghost is trapped. What valuable secrets are trapped within the mysterious tower?