The book "History of the Finnish Enlightenment of the 19th century. Part I. 1796-1835" by Mauno Rozendal tells about the development of the Geranium revival movement in Finland in the first half of the 19th century. The author investigates the origin, ideas and influence of this movement on the Finnish society and culture of that time. Rosendal analyzes in detail the historical events, personalities and ideas that underlie the Finnish Enlightenment, which contributed to the formation of national consciousness and cultural identity. This book is an important source base for the study of Finnish history and religious movements in 19th century Europe.