I’ve been wanting to read the proposed book, or even the notes for it, for about twenty years–since I read Chad Walsh’s C.S. Lewis: Apostle to the Skeptics, which mentions the plans of CSL and “his friend F.R.R. [sic] Tolkien” to write such a book. (Walsh’s book is dated 1949, and I believe was the first Lewis biography.) Just mentioned to somebody this weekend that I’d asked and asked and nobody even knew of any extant notes.