Harry had not immediately noticed the curly green writing across his hat - The Life and Lives of Albus Dumbledore - nor the slightly smaller writing across his chest; "by Rita Skeeter, bestselling author of Armando Dippet: Master or Moron?" -Harry Potter
Armando Dippet: Master or Moron? is a bestseller about one of the previous headmasters of Hogwarts (DH13).
A book written by Rita Skeeter about past Hogwarts headmaster Armando Dippet. This book is mentioned on the cover of the book she wrote about Albus Dumbledore, entitled The Life and Lies of Albus Dumbledore.