The "Capital in the Twenty-First Century" Hardcover by Thomas Piketty is a comprehensive textbook on economic policy, focusing on the history and current state of capitalism. Published by Harvard University Press in 2014, this 704-page book delves into the subjects of economics, government, and finance. Piketty's insightful analysis and detailed research make this a valuable resource for adult learners and those in further education looking to deepen their understanding of economic theory and policy.