C.S. LEWIS ON THE FINAL FRONTIER: SCIENCE AND THE SUPERNATURAL IN THE SPACE TRILOGY. Sanford Schwartz. New York: Oxford University Press, 2009. xvi + 224 pp. $27.95. ISBN 978-0195374728. (The index on pp. 199-224 was not in the advance review copy.) SCHWARTZ'S BOOK IS THE FIFTH BOOK-LENGTH STUDY of Lewis's Ransom Trilogy written by an individual, the others being: