Harry Potter and the Half-Moon Dentist

 was a book in the Harry Potter series written by PQ Rowling. (PROSE: Doctor Who and the Adaptation of Death)

Behind the scenes

 * In the novel The Gallifrey Chronicles, it is revealed that the Eighth Doctor possessed a set of all ten Harry Potter novels. In real life, J.K. Rowling as of 2017 has only written seven Potter books (not counting short spin-off works) but has stated she may write more novels set in the Potter universe in the future. Whether Half-Moon Dentist is one of those ten books is unknown, though Adaptation of Death is an Eighth Doctor story.
 * The books title is likely a parody of the sixth Harry Potter books title, The Half-Blood Prince.