Principles of Economics, 2/E
(ISBN 0-03-025951-7):
This complete version of the book contains 34 chapters and is designed for a two-semester introductory course covering both microeconomics and macroeconomics.

Principles of Microeconomics, 2/E
(ISBN 0-03-027016-2):
This "split" contains 21 chapters and is designed for one-semester courses in introductory microeconomics.

Principles of Macroeconomics, 2/E
(ISBN 0-03-029271-9):
This "split" contains 22 chapters and is designed for one-semester courses in introductory macroeconomics. It contains a full development of the theory of supply and demand.

Essentials of Economics, 2/E
(ISBN 0-03-029-271-9)
This version of the book contains 23 chapters. It is designed for one-semester survey courses that cover the basics of both microeconomics and macroeconomics.

Brief Principles of Macroeconomics, 2/E
(ISBN 0-03-028336-1):
This shortened macro split of 17 chapters contains only one chapter on the basics of supply and demand. It is designed for those instructors who want to jump to the core topics of macroeconomics more quickly.