Front Cover -- Book Title -- Copyright -- Contents -- Foreword -- Introduction -- Background: The Genesis of Saudi Arabian Security Concerns -- Twin Pillars: Saudi Arabia and Iran as U.S. Allies in the Persian Gulf -- A Pillar Collapses: From the Iranian Revolution to the End of the Cold War -- The New Strategic Landscape -- The U.S. and Saudi Security: Failing to Understand the New Strategic Landscape -- Notes -- About the Author -- About the Hoover Institution's Herbert and Jane Dwight Working Group on Islamism and the International Order -- Index.