The book "Business Grammar and Usage" by Longman is a comprehensive textbook that focuses on the grammar and usage of the English language in a business context. It is aimed at learners who wish to improve their language skills in the business world. The paperback offers a variety of exercises and explanations designed to deepen understanding of English grammar and promote its application in practical situations. With a clearly structured approach, it supports students in developing their skills in both written and spoken communication. The content is designed to be suitable for both classroom use and self-study.