How C.S. Lewis Critiqued and Improved Tolkien's Work

In June of 1938, J.R.R. Tolkien (The Hobbit and The Lord of the Rings author) wrote a letter to his editor Stanley Unwin explaining why he was behind schedule finishing the final draft for The Hobbit. Tolkien told Unwin that instead of drafting more material, he decided to start over and rewrite the first three chapters. What motivated Tolkien to go back and start ...