When librarian Patricia Wong discovered a series of seemingly random markings in returned books at her San Francisco library, she unknowingly stumbled upon an active foreign intelligence operation. The episode traces how Wong's curiosity about these unusual markings led to the discovery of a sophisticated communication network between foreign agents, operating through public libraries across multiple cities. The investigation reveals how traditional espionage techniques adapted to the digital age, and how an observant librarian's attention to detail exposed a modern spy ring hiding in plain sight within America's public institutions.
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When librarian Patricia Wong discovered a series of seemingly random markings in returned books at her San Francisco library, she unknowingly stumbled upon an active foreign intelligence operation. The episode traces how Wong's curiosity about these unusual markings led to the discovery of a sophisticated communication network between foreign agents, operating through public libraries across multiple cities. The investigation reveals how traditional espionage techniques adapted to the digital ag...