Piers Anthony

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.

Blue Adept is a book published in 1981 that was written by Piers Anthony.

Being A Green Mother is a fantasy novel by Piers Anthony. It is the fifth of eight books in the Incarnations of Immortality series.