The book is divided into two main parts: one half describes the historical development from the emergence of Islam to the 20th century, while the other half provides source texts and documents as evidence. This allows the reader to gain an overview of the development and to delve into specific questions. This remarkable publication is particularly relevant today. The book highlights the political significance of Islam, and its evaluation also allows for a better assessment of current developments. We can no longer avoid a thorough engagement with Islam, which is why it is important to consult reliable sources.