Portugal is a small country with an outsized history: it launched the first oceanic empire, tied itself to that empire for centuries, endured one of Europe's longest dictatorships, and then dismantled both in a nearly bloodless revolution. Read in order, that arc from Atlantic launchpad to modern democracy becomes one of the most instructive stories in European history.
Because the empire and the homeland shaped each other so tightly, the reading path alternates between them, and it treats the twentieth-century dictatorship with the balance it deserves, neither excusing nor caricaturing it.
The kingdom and its medieval roots
Start with A History Of Portugal And The Portuguese Empire, Disney's authoritative two-part survey that covers both the homeland and the empire, and use Portugal by Saraiva as a concise complement written from within the national tradition. For the Iberian backdrop, The ornament of the world illuminates the rich convivencia of medieval Iberia, and The reconquest of Spain explains the long Christian-Muslim struggle that shaped the peninsula Portugal emerged from.
The age of expansion
Portugal's defining century was maritime. The Portuguese seaborne empire by Boxer remains the classic account of how a tiny kingdom built a trading empire spanning Brazil, Africa, and Asia. Conquerors by Roger Crowley narrates the dramatic, often brutal Indian Ocean campaigns that made it possible, and Os Lusíadas, Camoes's national epic, lets you hear how Portugal mythologized its own age of discovery. Together they give both the history and the self-image.
Dictatorship, revolution, and democracy
The modern story is one of long authoritarian rule and its unwinding. Salazar by Meneses is the definitive biography of the austere dictator whose Estado Novo ruled for decades, and The Last Empire: Thirty Years of Portuguese Decolonization examines the costly colonial wars that helped bring him down. The Revolution of Carnations recounts the 1974 coup that ended the dictatorship almost without bloodshed, and Contemporary Portugal closes the path by tracing the country's consolidation as a European democracy.
Read in this order, Portugal's history resolves from scattered episodes into a coherent journey from empire to republic. Follow the full path to see the whole arc.