This is not an “economic history”; it is a “history of economics”. In other words, it is about the academic discipline of economics, its ideas, and the economists themselves. Begins roughly with Adam Smith in 1770 and ends in 1970. Very readable and very helpful as a starting place to orient oneself before reading any specialized books.
The economists who get their own chapters are: Smith, Malthus, Ricardo, Mill, Marx, Jevons, Menger, Walras, Marshall, Edgeworth, Pareto, Pigou, Wicksell, Fisher, Keynes, Frisch, and Haavelmo.
Many others are also mentioned (e.g. Thünen, Cournot, Dupuit, Gossen, Veblen, Mitchell, Chamberlin, Stackelberg, Mises, Lange, Lerner, Hayek, Schumpeter, Hicks, Samuelson, Arrow, von Neumann, Friedman, Solow, Buchanan, Akerlof, etc.) but as parts of larger sections (e.g. “The Forerunners of the Marginal Revolution” or “The Postwar Period”).