. . . . . . . . "The master spy handbook : help our intrepid hero use gadgets, codes & top-secret tactics to save the world from evildoers" . . . . . . "Readers can help Agent \"O\"--the world's best secret agent--foil the plot of a criminal mastermind by cracking codes, and learn how to be a spy by following lessons such as how to send secret messages, tail suspects, and see through walls."@en . . . "Juvenile works" . "Juvenile works"@en . "The master spy handbook" . . . . . "Learn the fine art of tailing, writing secret messages in invisible ink, setting up a secret rendezvous, or changing the size and appearance of your face." . . . "The master spy handbook : help our intrepid hero use gadgets, codes and top-secret tactics to save the world from evildoers"@en . "Readers can help Agent \"O\"--The world's best secret agent--foil the plot of a criminal mastermind by cracking codes, and learn how to be a spy by following lessons such as how to send secret messages, tail suspects, and see through walls." . . "Handicraft." . . "Espionage." . .