I LOVED THIS BOOK!If you love CS Lewis and his Chronicles of Narnia (deeply, not just casually, but DEEPLY), then you'll find this book very wonderful. Michael Ward, the author, brings in many of Lewis' other works and poetry, to explain his discovery (he says) of the underlying and unifying "theme" or "kappa element" in the Chronicles of Narnia -- the medieval cosmology of the planets. This cosmological theme in each book is the "kappa element" according to Lewis, which explains the atmospheric essence of a story. It is not explicitly stated "this book reflects Jupiter from medieval cosmology", but the atmosphere of the book reflects that in every conversation and setting in the book. After reading the book, I have come to agree that Ward has hit the nail on the head. Lewis had a lifelong interest in medieval cosmology, and the examples taken from the books to support Ward's premise are very strong supporters of his premise.Jupiter -- The Lion, the Witch, and the WardrobeMars -- Prince CaspianSol -- The Voyage of the Dawn TreaderLuna -- The Silver ChairMercury -- The Horse and His BoyVenus -- The Magician's NephewSaturn -- The Last BattleThis is a book for people who have read Lewis over and over again, and wondered about similarities of themes between "That Hideous Strength" from the Space Trilogy and discussions from "The Discarded Image" and back into Narnian lands. If you are not familiar with as much of Lewis' work, it may be a bit difficult to follow, but I still would recommend reading the book!