In the history of post-colonial Latin America no person has held power so firmly and for so long as did Pedro II as emperor of Brazil. Called to the throne in 1840 at the age of 14, Pedro II devoted himself for the next half century to transforming Brazil into a functioning nation-state, applying “all my forces and all my devotion to assuring the progress and prosperity of my people.” This is the first full-length biography in 60 years, and the first in any language to make close use of Pedro II’s diaries and family papers.