The book mentioned in the article, about JRR Tolkien and C.S. Lewis’s formative experience in WWI, is worth reading.
I agree it is a good book. I read it last summer.
A Hobbit, a Wardrobe, and a Great War: How J.R.R. Tolkien and C.S. Lewis Rediscovered Faith, Friendship, and Heroism in the Cataclysm of 1914-18 by Joseph Loconte