On the Sand Planet

[The last of the four Casher O'Neill stories, well summarized in the preface provided by an anonymous author: "This time Casher O'Neill returns to his home world of Mizzer determined to free it from tyranny, but before long that mission fades before a far more difficult problem--how to find meaning in life when he has accomplished everything he set out to do." Solving this problem might take him to some distant places, such as the Ninth Nile -- or even the Thirteenth Nile!]