This book is a reprinting of the original manuscript and cover of the 1944 declassified manual. Created by the United States Office of Strategic Services (the predecessor to the CIA) during World War II, this manual is a clandestine guide outlining tactics for individuals to subtly disrupt enemy operations. Focused on simple, everyday acts, the manual provides instructions on how to undermine organizations from within, emphasizing the power of small, inconspicuous actions to create chaos and hinder productivity. While historically significant, its reprinted versions continue to offer insights into the art of covert warfare and unconventional strategies for disrupting adversaries.