Sustaining Linguistic Diversity is an excellent contribution to the growing literature dealing with language endangerment. It provides a thoughtful and reflective approach not only to the overarching questions related to language endangerment, but also in-depth analysis of a number of challenging and often puzzling case studies. This is a book that any serious applied linguist ought to read. Language Problems and Language Planning [The] diversity of the material, the inclusion of plenty of varied linguistic data, tables and charts, and the range of viewpoints offered make this a refreshing book that will be enjoyed and valued by many. Journal of Sociolinguistics