This work on the taifas of the sharq al-Andalus and the Mediterranean offers a different view, not from within al-Andalus but from the context of the Mediterranean described by Christophe Picard in his La mero das Califas (2014). History from the sea, which starts by analysing the narrow strip of land that constitutes the sharq al-Andalus. A territory defined in the sources as the area where the rivers flow into the Mediterranean, with their mouths forming a coastal profile dominated by wetlands and extensive lagoons such as those of Valencia and Elche. In addition, inland seas such as the Mar Menor in Murcia and very important and valuable natural salt marshes such as that of La Mata de Guardamar del Segura were formed along the coast. Coasts open to the dreaded easterly winds and dominated by the currents of the Strait of Gibraltar, which forced vessels to follow the coast as far as Denia, from where they set sail for the western Mediterranean via the route of the Balearic Islands, described by Arab geographers, the backbone of the itineraries and navigation routes between the Islamic coasts of the south and the Christian coasts of the north. Maritime geography and navigation routes are analysed in this book not only from Latin chronicles and Arab sources but also, and in a new way, from the information provided by archaeological methodology, both terrestrial and underwater.