MacDonald was a major Christian writer of the late nineteenth, early twentieth centuries. He influenced nearly everyone who was a major twentieth century writer (including Lewis Carroll, WH Auden, JRR Tolkien, Walter de la Mare, and CS Lewis. Not only was he a pioneer in the fantasy fiction genre, laying the path for people like Tolkien to write Lord of the Rings, but also a major Christian thinker, which influenced Lewis profoundly.
'I know hardly any other writer who seems to be closer, or more continually close, to the Spirit of Christ Himself.'
- C.S. Lewis on George MacDonald