The book "William's Letters to His Father King Frederick William III. (1827-1839)" is a collection of personal letters written by William I, the German emperor, to his father, King Frederick William III. This collection of letters reveals to the reader the inner world of foresight and greatness of this outstanding ruler who played a key role in the formation of the German Empire. The letters reflect the political events, family moments and personal impressions of William I, as well as his views on the important issues of the time. Readers will have the opportunity to better understand the image of Wilhelm I, his relations with his relatives and political allies, as well as the important events that took place in Germany at the end of the 18th and the beginning of the 19th centuries. This book is not only a source of historical facts, but also a touch of human relations and feelings of an outstanding statesman of that period.