"The Czar's Madman" is a historical novel by Jaan Kross, set in 18th century Russia. It tells the story of Estonian nobleman Johan von der Brüggen, who is imprisoned in a mental asylum for opposing the policies of Czar Peter the Great. The narrative explores themes of power, madness, and the struggle for personal freedom. The novel delves into the complexities of political dissent and the consequences of challenging authority. Through Brüggen's experiences, readers gain insight into the harsh realities of life under a repressive regime, as well as the fine line between sanity and insanity in a tumultuous historical context.