Allen, G. (2002). Languages. Hexham, Northern Ireland: Flambard.
The book briefly discusses the history of English grammar in various regions and reviews its development according to various levels of the linguistic theory. Each chapter of the book consists of discussions along with detailed analyses and comprehensive notes that aid the linguistic understanding of the reader. This allows the reader to trace the development of the English language by providing them with a deeper insight into its linguistic development.
Batibo, H. (2005). Language decline and death in Africa causes, consequences, and challenges. Clevedon: Multilingual Matters.