Armando Dippet: Master or Moron? is a best-selling biography of Armando Dippet, written by Rita Skeeter. Its exact date of publication is unknown, but it was presumably before The Life and Lies of Albus Dumbledore was released, given the blurb which was printed on that book's cover, which read "by Rita Skeeter, bestselling author of Armando Dippet: Master or Moron?" It may have been written just after Dippet's death, as Rita Skeeter released both The Life and Lies of Albus Dumbledore and Snape: Scoundrel or Saint? shortly after the deaths of their respective subjects.
Given Skeeter's usual writing methods and the content of her other known books it is likely that the book is just as inaccurate as her newspaper articles in the Daily Prophet. Events such as the confiscation of his broomstick were likely touched upon.
- Harry Potter and the Deathly Hallows (Mentioned only)