Detailed Explanation and Structure of “Essential Grammar in Use” (4th Edition by Raymond Murphy) Overview “Essential Grammar in Use” (4th Edition) by Raymond Murphy is a comprehensive self-study reference and practice book for elementary learners of English. It is designed for students with some basic knowledge of English who wish to consolidate and expand their understanding of grammar. The book is structured to allow both self-study and classroom use, focusing strictly on grammar (not vocabulary, pronunciation, or other language skills).