The book "Report on the Eighth Congress of Esperantists (Krakow 1912)" by Katryn and Ned is a unique document that reveals the events and discussions that took place during the historic Congress of Esperantists in Cracow in 1912. The book contains a detailed description of the meetings, discussions and decisions that influenced the further development of the Esperanto language and its community. The authors make efforts so that readers can experience the atmosphere of that time and feel the importance of the discussed topics. This book is not only a source of information for historians, but also an interesting read for anyone interested in the history of language and international communities.