McConnell and Brue�sEconomics: Principles, Problems, and Policiesis 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. .