He is particularly known for his verse drama _Thomas Cranmer_, which deals with the life of Thomas Cranmer, Archbishop of Canterbury during the reign of Henry VIII.
Sadler was born in Sheffield in 1908 and educated at St Edmund Hall, Oxford. After graduating, he worked as a schoolmaster in England and then in Rhodesia. He was ordained in 1944 and served as a curate in Essex before returning to Rhodesia in 1946.
In 1951, he became headmaster of St David's Mission School in Harare. He was also a member of the Church of the Province of Central Africa's liturgy commission and served as its chairman from 1963 to 1969. He retired from St David's Mission School in 1967 and returned to England. He died in 1993.
The following are some of the books written by Graham Vernon Sadler:
* _Thomas Cranmer: A Verse Drama_ (1954)
* _The Passion and Death of Our Most Holy Redeemer_ (1955)
* _The Way of Perfection_ (1956)
* _The Creed_ (1958)
* _The Ten Commandments_ (1959)
* _The Lord's Prayer_ (1960)
* _The Church's Sacraments_ (1961)
* _The Christian Year_ (1962)
* _The Saints of the Christian Calendar_ (1963)
* _The Christian Life_ (1965)
* _The Bible: Its Origin and Authority_ (1967)
* _The Story of the Church_ (1969)
* _The Life of Jesus Christ_ (1971)
* _The Life of St Paul_ (1973)
* _The Life of Thomas Cranmer_ (1975)
* _The English Reformation_ (1978)
* _The Oxford Movement_ (1981)
* _The Age of Reason_ (1984)
* _The Romantic Movement_ (1987)
* _The Victorian Age_ (1990)
* _The Twentieth Century_ (1992)