Henry Hay (writer) was the pen name of June Barrows Mussey (March 30, 1910 – July 27, 1985), a journalist and translator who is notable for his writing about sleight of hand and magic. He was born in New York and lived in West Germany after the Second World War. Mussey was a friend of the famous coin manipulator Thomas Nelson Downs. His highly-regarded The Amateur Magicians Handbook (1950) has gone through many printings and is still considered a standard reference work among magicians.