The Company They Keep: C. S. Lewis and J. R. R. Tolkien as Writers in Community (2007) is a non-fiction book written by Diana Pavlac Glyer, an Inklings scholar and English professor at Azusa Pacific University. The Company They Keep challenges the commonly held belief that the Inklings did not influence each other through a detailed and engaging examination of both published and unpublished works, papers, and letters written by J.R.R. Tolkien, C.S. Lewis, Charles Williams, Owen Barfield, Warren Lewis and the lesser-known writers who comprised the Inklings.