I teach a graduate course in marketing for nonprofit organizations and am always on the lookout for a good text that covers key issues without including complex material that the general manager doesn't really need to know (e.g., Fishbein formula, etc.). This book comes close, although it does have limitations for U.S. students because some of the chapters refer to systems and structures that exist only in the U.K. However, that can also be a plus, providing a perspective that is a bit more globally focused than many of the texts by U.S. publishers.
While this book provides a solid grounding in the basics, I found that I still needed supplemental materials in order to provide students will the full picture of nonprofit marketing, specifically readings and case studies about social marketing, on which this book is rather light. An good companion volume is Marketing the Public Sector, by Seymour Fine, which is (sadly) out of print, but worth tracking down. The conscientious instructor will need to do some customized updating of the Fine book, since by now it is quite old and much has changed. Nevertheless, it is a useful resource, for which I have not been able to find an adequate replacement.
One asset of the Sargeant book is its price, which is considerably less than the standard text used in nonprofit marketing courses -- Alan Andreason's Marketing in Nonprofit Organizations. In good conscience, I just can't require my students to puchase a text that costs $120., especially since many of them are working for modest salaries in charitable organizations. On the whole, the Sargeant book is one of the best I've found for providing a sound overview of nonprofit marketing concepts at a reasonable price.