Hardcover, 303 pages
English language
Published April 11, 1990 by Putnam's.
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In this seventh and last book in the series, the author brings the history of the two planets Phaze and Proton to a conclusion. The author also wrote "The Magic of Xanth", "The Bio of a Space Tyrant", "The Incarnations of Immortality" and "The Apprentice Adept".