Alberico Seiling was one of the most famous motorbike manufacturers in Italy in the 1920s and 1930s. MAS motorbikes excelled in regularity races, achieving extraordinary success in numerous competitions, among them the 16 gold medals won at the International Six Days (ISDT). A name that is a commitment. His German grandson, Andreas Seiling, and his wife recount the life of this exceptional man in a mix of technical details and family history that is both gripping and exciting. The book also includes all the technical data of the entire MAS motorbike production, with a corollary of original and, for the most part, previously unpublished documents. The book, in Italian and German, will be enthusiastically received by Italian MASsisti but also by motorbike enthusiasts in Germany and the rest of the world.