This document provides an overview of a book titled "World English: A Study of its Development" by Janina Brutt-Griffler. The book examines how English has become a global language through the processes of language spread and language change. It argues that English owes its status as a world language not just to imperialism, but also to the agency of non-native English speaking communities in reshaping the language. The book aims to connect the study of how English spread with how it changed, in order to understand how post-colonial writers have made English their own. It proposes analyzing English's global development through the lens of "macroacquisition" by bilingual speech communities rather than through political or social frameworks.