Admiralty Handbook of Wireless Telegraphy. Vol I: Magnetism and Electricity; Vol. II: Wireless Telegraphy Theory. [Complete set.]

First published in 1938 and reprinted in every year of the war to keep pace with the expanding fleet, the Admiralty Handbook of Wireless Telegraphy was the RN telegraphist's bible throughout WWII. It remains one the finest compact guides to both theory and practice, and in post-war years became a fundamental and much sought-after tool of the amateur radio community.