Publisher, Faber and Faber, London, 1952. With a five-page Preface by C.S. Lewis. First edition.
pp. 268 with many b/w illustrations/diagrams
Hardback, bound in blue book-cloth with gilt lettering to spine.
Condition, Used – A good copy in dust-jacket (chipped at head of spine panel, which is a little darkened).

A very scarce C.S. Lewis title.