The Inklings Handbook: The Lives, Thought and Writings of C.S. Lewis, J.R.R. Tolkien, Charles Williams, Owen Barfield and Their Friends by Colin Duriez
A comprehensive guide to the lives, thought and writings of C.S. Lewis, JRR Tolkien, Charles Williams, Owen Barfield and their friends. The book falls into two parts: the first introducing the Inklings, with the second longer part in dictionary format, with many biographical articles, as well as substantial entries on the Inklings' writings, themes and theology.