This book presents the summary of Marx's "Capital," which was prepared by Paul Lafargue, a French socialist writer, journalist, activist, and Marx's son-in-law, as he married Marx's second daughter, Laura. The summary is preceded by an extensive preface about the life, philosophical foundations, and the evolution of Marx's revolutionary thought and action. Lafargue's work manages to popularize and turn one of the greatest works of the leader of communism into a concise read.