books.google.com - This is a lucid and up-to-date overview of language change. It discusses where our evidence about language change comes from, how and why changes happen, and how languages begin and end. It considers both changes which occurred long ago, and those currently in progress. It does this within the framework...https://books.google.com/books/about/Language_Change.html?id=KjcYC0qp2PgC&q=problems&utm_source=gb-gplus-shareLanguage Change
