John Quincy Adams by Robert V. Remini

A vivid political biography that follows Adams from precocious diplomat and architect of early American foreign policy—shaping the Monroe Doctrine and negotiating the acquisition of Florida—to a frustrated and often isolated presidency undermined by the “corrupt bargain,” and finally to a long, passionate second career in the House of Representatives where he became a leading opponent of slavery, a stalwart defender of civil liberties (most famously in the Amistad case), and a persistent voice for national principle; drawing on correspondence and government records, the book portrays a brilliant, principled but aloof statesman whose integrity limited his political popularity even as it cemented his lasting influence on American institutions.