The Fall of Gondolin by J.R.R. Tolkien HarperCollins, 2018, 304 pages, $45 __________________________ With the release of The Fall of Gondolin last August, Christopher Tolkien’s forty-year commitment to the compiling and publishing of his father’s works has come to a conclusion. This book, like last year’s Beren and Lúthien, collects a variety of partial or unfinished editions of the story and presents them between two covers. The Fall of Gondolin is Christopher’s “indubitably” final volume based on his father” literary output, and it also marks the culmination of the publication of the three “Great Tales” centred on Middle-earth’s First Age.…