The article discusses how supply, demand, and prices in economics are balanced through pricing mechanisms in a concept called general equilibrium. The author explores how this theory has evolved to include multiple markets and economic agents. The book explains how the equilibrium manifold approach can be applied to various economic models, from basic consumer theory to models with private ownership of production. It also looks at different equilibrium solutions and market price discontinuities using economic concepts and differential topology methods. The book is designed for graduate economics students, advanced undergraduates in mathematics, and researchers in the field.