on 27 October 2003
This is an important book for undergraduates, simply because there are not too many alternatives. Mankiw succeeds in giving the basic overview on topics such as growth, unemployment, inflation, business cycles, and government policy, but only in a limited sense.
There are several serious flaws in the book too: he ignores many important points, and often confuses the analysis, especially between the short run and the long run.
So by all means, use this book as a starting point, but be critical of it. For a more technical and advanced text, see Advanced Macroeconomics by Romer.