Pictures Bloomsbury to auction Patronus postcards to celebrate ‘Azkaban’ 20th anniversary Jack Russell Terrier (Chris Riddell Patronus on a Postcard) ← From Bloomsbury to auction Patronus postcards to celebrate ‘Azkaban’ 20th anniversary Patronus on a Postcard 2019 Chris Riddell Harry Potter Prisoner of Azkaban Explore all Wizarding World pictures →