The OSS sent librarians and scholars to outposts in Stockholm, Lisbon, and other neutral cities to spearhead a vast collecting and microfilming operation. They acquired enemy newspapers, scientific journals, resistance pamphlets, and other types of open-source intelligence. Crossing paths with spying allies, enemy provocateurs, booksellers, and gossips, the librarians turned into intelligence agents, who used their professional skills in a dangerous information economy. Publications came to have value and meaning as intelligence. The OSS librarians confronted the problem of information overload as thousands of microfilm reels arrived in Washington. Through classifications, indexes, abstracts, and full-text translations, work done not by computers but by women and émigrés, they pioneered applied techniques of information science.