The Forts of Old San Juan: Guardians of the Caribbean
provides a history of Puerto Rico and the forts Spain established on the island to help protect its growing population and riches in the Caribbean... (National Park Service, Teaching with Historic Places)
Puerto Rico at the Dawn of the Modern Age, 1831-1929
portrays the early history of the commonwealth of Puerto Rico through first-person accounts, political writings, and histories drawn from the Library of Congress's general collections... (Library of Congress)