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The sixth edition of the award-winning book. A movie of the same name was made based on the story "Spy Connection".
"Who sent intelligence information about the movement of our warships abroad? Who were the visitors to the abandoned German bunker and what secrets did the lonely river island hide? Who in a specially made shoe was supposed to transfer micro-film with classified information abroad? How Did the Security Service discover a group of foreign spies planning to blow up a train with trophy ammunition?"
One copy is available