This book is devoted to the study of the Europeanization of Spanish administrative law, and its scope results, therefore, from the intersection of two basic notions. On the one hand, Europeanization is understood here as a top-down process of innovation suffered by national law as an outcome of the structural principles which govern the relations between European and national systems. On the other hand, the book focuses on some of the most important institutions of Spanish general administrative law, in order to give a wide and comprehensive insight into the transformations of the system, thus going beyond the description of the transformations experienced by the regulation of concrete sectors of administrative action. Specifically, the main topics discussed include regulation of administrative procedure, case law on the right to good administration, public procurement law, public services regulation, interim measures in judicial review, and the evolution of administrative sanctions.