The radio is one of the most widely used media worldwide. It must continuously adapt to advancing technology and new user demands, evolving over time. The author, Julia Wachholz, provides an introductory look at the history of the medium, its technical functionalities, and the underlying physical and mathematical principles. Both social and technical aspects are examined and connected. The book explains both analog and digital reception methods and their development. The underlying communication technology, specifically antenna technology, is discussed, and various transmission methods are described, allowing for an evaluation of the usage spread of different techniques.