Roger Lancelyn Green was born in 1918 in Norwich, England.

He studied under C. S. Lewis at Merton College, Oxford, where he obtained a B.Litt. degree. He remained close to Lewis until his death in 1963, and holidayed in Greece with Lewis and his wife Joy Gresham just before her death from cancer in 1960.

Lancelyn Green delivered the 1968 Andrew Lang lecture.

Lancelyn Green lived in Cheshire, in a manor which his ancestors owned for over 900 years. He died in October 1987 at the age of 68.

His son was the writer Richard Lancelyn Green.

Fiction

Lancelyn Green produced retellings of the myths of Greece (Tales of the Greek Heroes and The Tale of Troy) and Egypt (Tales of Ancient Egypt), as well the Norse mythology (Myths of the Norsemen and The Saga of Asgard) and the stories of King Arthur (King Arthur and His Knights of the Round Table) and Robin Hood (The Adventures of Robin Hood). Original fiction included The Luck of Troy (set in the Trojan War) and The Land of the Lord High Tiger, a fantasy that has been compared to the Narnia books.

Chronological order

• The Singing Rose and other poems (Edmund Ward 1947)
• King Arthur and His Knights of the Round Table (1953)
• The Adventures of Robin Hood (1956)
• The Book of Nonsense (1956)
• Two Satyr Plays: Euripides' Cyclops and Sophocles' Ichneutai (1957)
• The Land of the Lord High Tiger (1958)
• Tales of the Greek Heroes: Retold From the Ancient Authors (1958)
• The Tale of Troy: Retold from the Ancient Authors (1958)
• Mystery at Mycenae: An adventure story of ancient Greece (A wonderful world book) (1959)
• Myths of the Norsemen: Retold from the Old Norse Poems and Tales (1960)
• A Century of Humorous Verse 1850-1950 - Everyman's library (J. M. Dent & Sons 1959)
• The Saga of Asgard: Retold from the Old Norse Poems and Tales (Puffin Books 1960)
• The Luck of Troy (1961)
• Authors & Places: A Literary Pilgrimage (1963)
• Tellers of tales : British authors of children’s books from 1800 to 1964 (1965)
• Tales the Muses told; ancient Greek myths (1965)
• Tales from Shakespeare (Atheneum 1965)
• Tales of Ancient Egypt (1967)
• Ancient Greece (John Day Co. 1969)
• A cavalcade of dragons (H. Z. Walck 1970)
• A cavalcade of magicians (H. Z. Walck 1973)
• Tale of Thebes (Cambridge University Press 1977)
• The Beaver Book Of Other Worlds (1978)

Biographies

He wrote biographies of J. M. Barrie, Andrew Lang and C. S. Lewis. His new edition of selected tales of Hans Christian Andersen contains a short biography. He wrote a brief biography of Anthony Hope as the introduction to a one-volume Everyman's Library edition of The Prisoner of Zenda and its sequel Rupert of Hentzau. He was editor of the Kipling Journal, 1957—79.

Lancelyn Green was particularly interested in Lewis Carroll, publishing several books and articles. His book The Story of Lewis Carroll (1949) led to an invitation from Carroll's nieces, Violet and Menella Dodgson, to produce an edited version of his diary; this appeared in 1953, and has been at the centre of the recent debate about the alleged 'Carroll Myth'. Karoline Leach devoted much space to considering it in her book In the Shadow of the Dreamchild, claiming that something like 60% of the diary material was left out of this publication, and that Lancelyn Green's allegedly partial, inaccurate and misleading editing had contributed to a continued misrepresentation of Carroll in biographies and the media. At the time of publication, Lancelyn Green claimed to have seen all the diaries and certainly gave the impression he had been allowed unrestricted access, however Leach alleges he later retracted this claim and admitted he had been forced to work with heavily edited transcripts prepared for him by Menella Dodgson, 'for reasons of safety'. He was later a founder and vice-president of the Lewis Carroll Society and helped Morton N. Cohen to edit Carroll's collected letters.

Chronological order

• Andrew Lang: A critical biography (E. Ward 1946)
• The story of Lewis Carroll (H. Schuman (1951)
• A.E.W Mason The Adventure of a Story Teller (Max Parrish 1952)
• The Letters of Lewis Carroll: 2 volumes (1953)
• J M Barrie a Bodley Head monograph (Bodley Head 1960)
• Lewis Carroll (Bodley Head 1960)
• Mrs Molesworth (Bodley Head 1961)
• The readers' guide to Rudyard Kipling's work (R.E.Harboard 1962)
• Kipling and the Children (Elek Books 1965)
• Henry Treece, C.S.Lewis and Beatrix Potter (Bodley Head Ltd 1969) with Margery Fisher and Marcus Crouch
• C. S. Lewis: a biography (1974) with Walter Hooper

He was a part-time professional actor, 1942—5, and was a member of the Oxford literary group, the Inklings, led by C. S. Lewis and J. R. R. Tolkien. He was Deputy Librarian of Merton College, Oxford, 1945—50 and William Nobel Research Fellow in English Literature at the University of Liverpool, 1950—2. He was later a member of the Council of the University of Liverpool, (1964—70).