Books

Books about artificial languages
Books about language revitalization
Books about endangered languages
Books about numbers
Books ordered by natural languages
Books ordered by artificial languages

Ethnologue: Languages of the World, 16th EditionEthnologue: Languages of the World, 16th Edition
editors SIL International (2009)
[Amazon.com]

Languages of the World: An IntroductionLanguages of the World: An Introduction
by , editors Cambridge University Press (2012)
[Amazon.com]

The Atlas of Languages: The Origin and Development of Languages Throughout the WorldThe Atlas of Languages: The Origin and Development of Languages Throughout the World
by , editors Facts on File (2003)
[Amazon.com]

Through the Language Glass: Why the World Looks Different in Other LanguagesThrough the Language Glass: Why the World Looks Different in Other Languages
by , editors Picador (2011)
[Amazon.com, Kindle - Amazon.com]