Book excerpt: The essays in this volume explore communication across cultures using an interdisciplinary approach to language teaching and learning, mediated by the growing field of educational linguistics. Topics include the use of English as a medium of wider communication and the growth of national varieties of English throughout the world. An international array of distinguished contributors includes scholars from China, Great Britain, Hong Kong, India, Israel, Nigeria, Singapore, Taiwan, Ukraine, and the United States. This collection suggests that language diversity is a unifying force in a globally interdependent world.