The sixth edition of Sayre/MorrisPrinciples of Macroeconomicscontinues to deliver the writing style and features that have defined it for the first five editions. Where many first year books have a "micro" author and a "macro" author, Sayre and Morris take a different approach by fully collaborating on all writing for all the chapters in both the micro and macro books. This approach delivers a careful integration between the micro and macro books that is unique. Nor is Sayre and Morris an adaptation of a US title, but is rather a book that was written and developed over many years of class testing at the authors' school.
Sayre/Morris pioneered the idea of integrating the study guide into the texts – something that has recently been copied, but not equaled. It is organized into three main sections (Review, Answered Questions and Problems, Unanswered Parallel Problems) that first provide a review of the material in the chapter, and then go on to give students practice questions that cover every concept that the students have learned about in the chapter, providing them with the practice that is necessary to excel in their principles course, and following the authors' belief that students learn economics "by doing economics". The text with integrated study guide, combined with the available Lyryx for Economics (for which Alan Morris provided the technical consulting), provides an integrated learning package for students that has been carefully considered and constructed to provide the best learning package available for students.