[1] The first stand-alone edition of the title story was published as an E-book by Gollancz's SF Gateway imprint on September 29, 2011 as part of a general release of de Camp's works in electronic form.

[5][6] The title story concerns Rollin Hobart, a man transported to another plane whose natural laws are those of Aristotelian logic; that is, everything is either one thing or another, with nothing in between and no gray areas.

In the course of his adventures he picks up a royal local lady-love and rises to become the master of the plane, but elects to abandon both to return to his mundane life.

"[7] Anthony Boucher and J. Francis McComas called it one "of the best novels from 'Unknown,'" and stated it had "that splendid absurd rigorousness which distinguishes such other vintage de Camp items as the Harold Shea series.

"[8] Groff Conklin, on the other hand, felt the book suffered by comparison to Rogue Queen, another de Camp novel published the same year, which he found much more impressive.

"[11] Don D'Ammassa, while dismissing de Camp's pre-1960 solo fantasies as "comparatively minor," called The Undesired Princess "the best of these ... with frequently hilarious developments.