Understanding Economics, 13th edition by Gwartney is the most accessible principles books on the market. The 13th edition of Understanding Economics has been updated to include coverage of the recent economic conditions. The new edition reflects current economic conditions, helping students apply economic principles to the world around them. You'll find analysis and explanation of measures of economic activity applied to today's markets and highlighting the recession of 2008-2009, plus text on the lives and contributions of notable economists. Common economic myths are dispelled, and the invisible hand metaphor is applied to economic theory, demonstrating how it works to stimulate the economy. The thirteenth edition of Understanding Economics includes a robust set of online multimedia learning tools, with video clips and free quizzes designed to support classroom work. A completely updated Aplia interactive learning system is also available, completely with practice problems, interactive tutorials, online experiences and more.