"A Monarch in the Anarchy" by Joshua Sturgill

How does a dinosaur become a dragon-slayer? Lewis's protagonist in the Ransom Trilogy (mis-named the Space Trilogy) answers this question. Patterned after Lewis himself and his professorial friends, Elwin Ransom is a college don, a philologist and an ageing bachelor who finds himself unexpectedly kidnapped and taken to another planet. As the story unfolds, the reader discovers along with Ransom that more than mere space travel has been achieved: an ancient boundary has been broken. Since humans have ventured beyond the Moon, the heavenly powers are now also permitted to come to earth. The full consequence of the breach is revealed in the descent of the Planets as they join the fight against an outbreak of spiritual evils in the heart of post-war England. Ransom, once an unwilling victim of evil, has become a champion on the side of good, taking on the mantle of an ancient kingship. Once a dinosaur in the sense of having an obsolete and uninteresting role in society, Ransom is now England's hidden sovereign; he is a sacred bridge between heaven and earth, tasked with destroying an old menace which has threatened to return.