by Maria Maneru · LIBSA EDITORIAL · tapa dura · ISBN 9788466208512
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«El enigma de los códigos secretos» is a children's and young adult book by María Mañeru, published by Libsa Editorial in hardcover (134 pages, in Spanish).
Spies, lovers, soldiers, detectives and adventurers have used codes and languages to hide messages. The book covers famous cases such as Julius Caesar, the Man in the Iron Mask or Sherlock Holmes, and proposes activities: invisible ink, Egyptian alphabet, Morse code or Braille, with examples and exercises.
The original edition was published in 2004 and includes color illustrations; the ISBN-13 is 9788466208512.
For curious young readers who want to get started in the world of codes and hidden messages with practical activities.
