The diaries of Erich Mühsam offer a unique insight into the life of one of the most well-known German anarchists. Over a period of 15 years, from 1910 to 1924, Mühsam documents his thoughts, experiences, and political beliefs in a stylistically concise and unflinching manner. These records are not only a personal document but also a historical testament to a time of upheaval. Mühsam lived anarchy as a way of life without moral constraints and conventions, which is reflected in his writings. The diaries are a monumental work published in 15 volumes and are also available as an online edition. The carefully edited text volumes are supplemented by a commentary apparatus that includes a commented name index, explanations of terms, and additional materials to provide a comprehensive understanding of the historical contexts.