The book "North of the fifty-third parallel" by Sinclair, Bertrand W. is an exciting spy novel that transports readers to the realities of the cold Great Patriotic War. The main character, an agent of the special services, receives the task of catching a great Russian spy who operates in the north of the fifty-third parallel. This mission turns into a dangerous chase, which requires the hero not only the ability to penetrate behind enemy lines, but also tests his moral principles and loyalty to his native country. Readers will obey the intense atmosphere of the book, incredible turns of events and unpredictable finale, which will remain in the memory for a long time.