"In this book, Campbell demonstrates in a very convincing way how people in Germany integrated new technologies in their daily lives and thus came to terms with a technical modernity between the 1920s and the 1950s. ... The book is impressive, putting the development of the radio hobby in the context of societal, technological, political, and economic changes during an important period of changeful German history-a must-read for understanding the genesis of today's mobile and connected society." (Christian Henrich-Franke, Technology and Culture, Vol. 62 (2), April, 2021)