C. S. Lewis and J. R. R. Tolkien, the creators of Narnia and Middle-earth, were close friends, colleagues, and members of the Inklings, a writers group that met in Oxford in the 1930s and 1940s, sharing and discussing their works-in-progress. This important study challenges the standard interpretation that Lewis, Tolkien, Charles Williams, Owen Barfield, and the other Inklings had little influence on one another's work, drawing on the latest research in composition studies and the sociology of the creative process. Diana Glyer invites readers into the heart of the group, examining diary entries and personal letters and carefully comparing the rough drafts of their manuscripts with their final, published work. Her analysis not only demonstrates the high level of mutual influence that characterized this writers group but also provides a lively and compelling picture of how writers and other creative artists challenge, correct, and encourage one another as they work together in community.