The "Economic Theory in Retrospect" by Mark Blaug, Fourth Edition paperback book published by Cambridge University Press in 1990, is a comprehensive textbook on economics that delves into the history and evolution of economic theories. With 770 pages, this book provides a detailed analysis of various theories and concepts in the field of economics, making it a valuable resource for students and professionals alike. Written in English, this book offers a thorough examination of economic theories in a clear and accessible format, making it an essential addition to any collection of economic literature.