The stamps in this set are called: Quiddich Match, Dementors, Riding a Hippogriff, Third Year at Hogwarts, Practicing the Patronus Charm to Repel Dementors and Conquering Fears.
Harry Potter and the Prisoner of Azkaban
VFNH 2004 NT$50
"Hogwarts" and "Magical Creatures"
Taiwan S/S duo (12)
See also the 2005 "Goblet of Fire" sheets here.