A Threat of the First Magnitude — The untold story of the FBI informants who penetrated the upper reaches of organizations such as the Communist Party, USA, the Black Panther Party, the Revolutionary Union and other groups labeled threats to the internal security of the United States.

Leonard and Gallagher turn a welcome spotlight on the informants who infiltrated deeply and likely illegally into radical political groups. – Scott Martelle, author of Blood Passion: The Ludlow Massacre and Class War in the American West

A fascinating history that is also a prescient warning. After reading this book, I can’t help but wonder how things might have turned out if the government’s informants had never been members of the groups they helped destroy. – Ron Jacobs, author of The Way the Wind Blew: A History of the Weather Underground

Heavy Radicals: The FBI's Secret War on America's Maoists — The hidden story of the largest Maoist organization to arise in the United States out of the turbulent Sixties and the unprecedented campaign by the FBI against it.

Masterfully written and extensively researched...  This book is a MUST READ for anyone invested in nuancing their understanding of revolutionary political struggle and unrelenting state repression in the United States--Robeson Taj Frazier, The East Is Black: Cold War China in the Black Radical Imagination

Meticulously researched... in examining how the FBI acted, we are better able to understand the methods employed in undermining dissent today--Eveline Lubbers, Secret Manoeuvres in the Dark: Corporate and Police Spying on Activists