This work investigates the complex political transition of Spain from the authoritarian regime of Francisco Franco to a stable, modern democracy. Paul Preston, a preeminent historian of 20th-century Spain, utilizes extensive archival research and primary source interviews to document the internal and external pressures that shaped the Spanish state. He argues that the transition was not an inevitable outcome but a precarious process managed by key political actors navigating deep-seated societal divisions.

Experts and historians frequently cite this work as a foundational text for understanding the mechanics of Spain's political evolution. Readers often note the academic rigor and the dense, analytical nature of the prose which provides a comprehensive overview of the period.