This book entitled “varieties of English - A Guide to World Englishes" will be useful to M.A (English) students especially in the area of Linguistics and post-graduate teachers. Modern English, sometimes described as the first global lingua franca, is the dominant language or in some instances even the required international language of communications, science, information technology, business, entertainment, radio and diplomacy. Its spread beyond the British Isles began with the growth of the British Empire, and by the late 19th century its reach was truly global. Following British colonisation from the 16th to 19th centuries, it became the dominant language in the United States, Canada, Australia and New Zealand. A working knowledge of English has become a requirement in a number of fields, occupations and professions such as medicine and computing; as a consequence over a billion people speak English to at least a basic level. It is one of six official languages of the United Nations. One impact of the growth of English is the reduction of native linguistic diversity in many parts of the world. Its influence continues to play an important role in language attrition.