Quest of the Three Worlds is a collection of four stories by Cordwainer Smith published in 1966. The stories feature the character Casher O'Neill. [1]
Dave Langford reviewed Quest of the Three Worlds for White Dwarf magazine (issue #99). He wrote that "In their far-out, mystical way, these aren't the most accessible of Smith's many linked stories: a tasty sample, though." [1]