McConnell and Brue Economics: Principles, Problems, and Policies is the leading AP* Economics textbook, because it is innovative and teaches students in a clear, unbiased way. Taking a patient, step-by-step approach,. the authors explain the theory and models slowly and thoroughly. . The Eighteenth Edition builds upon the tradition of leadership by sticking to three main goals: - Help the beginning student master the principles essential for understanding the. economizing problem, specific economic issues, and the policy alternatives. -Help the student understand and apply the economic perspective and reason accurately and objectively. about economic matters. -Promote a lasting interest in economics and economy. .