Among the Truthers
 Though he concedes that history provides evidence of actual conspiracies, Kay argues that farfetched and paranoid conspiracies are gaining adherents at an increasing rate in the United States. In the book, he charts a history of 20th century conspiracy theories including groups such as the John Birch Society. Though much of the book focuses on the 9/11 Truth movement Kay also discusses conspiracy theories about the Bilderberg Group, vaccination, and Reptilians. Kay attempts to define the factors that cause people to believe in conspiracies. He attributes some of the popularity of conspiracy theories to the influence of postmodern academic theories, such as deconstruction. He also blames what he sees as the liberal belief that "society is divided into victims and oppressors". In addition to political explanations, Kay also writes about psychological factors. He argues that many people prefer explanations for disasters which feature expansive conspiracies because it is more difficult to cope with the underlying incompetence or vulnerability at the root of such events. While writing the book, Kay interviewed several figures in the 9/11 Truth movement, such as Alex Jones and Michael Ruppert. Kay classifies promoters of conspiracy theories into different groups, including those he refers to as "cranks" and "firebrands". He defines a "crank" as a person who seek to expose conspiracies as an engrossing mission to fill their lives. He claims this type of person is usually drawn to conspiracy theories after a mid-life crisis.