Alianza Editorial is a Spanish publishing house founded in 1966 by José Ortega Spottorno "with the idea of serving the intellectual aspirations of Spanish society of that time and represents, since then, a reference for various generations of readers.
Alianza began its journey with the Pocket Book collection, intended to be a basic library for anybody interested in culture. It maintains that its offerings support every class of reader, "from those interested in literature to the university student looking for a highly specialized monograph." In its catalogue, one can find the works of Manuel Castells, Julián Marías, Anthony Giddens, Ramón Tamames, Giovanni Sartori, Miguel Artola and Isaiah Berlin, to name only a few authors. (Wikipedia).
Click on the image below to see all mass market titles