A well written and informative book that adresses one of the more underappreciated problems of the world of today: Language Death. At least 50% and according to some as much as 90% of the world's ca. 6.000 languages are in danger of dying out during the 21st century.
The book sheds clear light on the scale of this cultural disaster, mention many factors that have caused this process, including colonisation and globalisation: the 'biological and economic waves'. The authors also stress the ties between linguistic and ecological diversity - a view that is not uncontested, however.
All the same, any book that raises awareness of this problem in an eloquent manner is valuable, in my opinion, and 'Vanishing Voices' certainly fits that category. Recommended!