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Castle Roogna is the third book of the Xanth series by Piers Anthony. The castle itself is also the residence of the present King of Xanth.
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Centaur Aisle is the fourth book of the Xanth series by Piers Anthony. King Trent has left Xanth on a mission of trade to Mundania and has left Dor as temporary king. When Trent fails to return after some time, Dor must find a way to rescue Trent. He is informed that the means to rescue Trent lies to the south on …
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