Published in three volumes between 1774 and 1782, "Topographische Nachrichten von Lief- und Ehstland" is considered a seminal work in the field of Baltic historiography. Hupel's thorough research and accurate documentation make it an invaluable source of information for scholars and historians studying the region's past. The book covers various aspects of Estonian and Livonian history, including geography, demographics, economic conditions, social structures, and cultural traditions.
Hupel's writing style is characterized by its objectivity, attention to detail, and depth of research. He sought to present an accurate and comprehensive account of the region, drawing on a wide range of sources, including historical documents, archival records, and personal observations.
In addition to his work on Baltic history, Hupel also contributed to the study of Estonian and Livonian languages. He published several linguistic works, including a dictionary of the Estonian language and a grammar of the Livonian language. These works are essential resources for understanding the development and evolution of the Baltic languages.
Overall, August Wilhelm Hupel's contributions to Baltic historiography and linguistics were significant and influential. His scholarly works remain important references for researchers and scholars studying the history and culture of Estonia and Livonia.