In 'De Boeventaal' by W. L. H. Köster Henke, the reader is immersed in a fascinating exploration of the language used by criminals in the Dutch underworld. The book delves into the unique linguistic elements and slang terms that have developed within this secretive and often misunderstood subculture. Written in a concise and informative style, the book provides valuable insights into the language patterns and communication strategies of criminals, offering a glimpse into their hidden world. With references to both historical and contemporary sources, 'De Boeventaal' situates itself within the broader context of linguistics and sociolinguistics, making it a valuable contribution to the field. The author's meticulous research and attention to detail shine through in this comprehensive study. W. L. H. Köster Henke's background as a linguist and researcher likely influenced his decision to delve into this intriguing subject matter. His expertise in language studies shines through in the thorough exploration of Boeventaal. I highly recommend 'De Boeventaal' to readers interested in linguistics, sociolinguistics, and criminology, as it offers a unique and enlightening perspective on the language of the Dutch underworld.