Over the course of nearly 40 years, Dutch artist Jan Schoonhoven (1914–94) produced works on paper and sculptural reliefs, while maintaining his job as a civil servant employed by the Dutch Post Office. This new monograph places the artist, one of the most important Dutch artists of the 20th century, in an international context, arguing for his role as an influential player in European art after the Second World War. From his central position in the Netherlandish Informal Group, associated with Art Informel, to his later involvement with the Dutch Nul group, part of the international ZERO network, Schoonhoven participated in two of the most important currents of postwar European abstraction from his hometown of Delft. This volume features many hitherto unknown works and photographs, and sheds new light on the work of the "master of white."