We are excited to bring the Fourth Edition of the book. The basic question that GMAT aspirants struggle with, is whether they would have to become English Grammar "gurus" to do well in “sentence correction” on GMAT. This thought is intimidating, because it brings back memories of countless types of Nouns, Pronouns etc. that most students struggled with, in their High School. Typically students take two extreme approaches to deal with sentence correction: a) Give English Grammar a complete miss, hoping they can "somehow tackle" sentence correction without knowing even the basics of grammar. b) Go the whole hog, picking up a book such as Wren & Martin, to know "everything there is" to English Grammar Both the above approaches are extreme, and do not work for GMAT. On one hand, students cannot completely dis-regard grammar and still hope to do well on sentence correction; on the other hand, books such as Wren & Martin are an overkill for GMAT and also, are obviously not written with the requirements of GMAT in mind. The emphasis of our book is to bridge this gap and to provide a right mix of English Grammar and its applicability to GMAT sentence correction. The book would equip the students with the right balance of English Grammar, and official examples, all contributing to this book’s phenomenal potential among students preparing for GMAT. The book starts with an introduction to English Grammar, with the intent of laying the basics of Grammar in place. Topics covered as part of this section include Parts of speech, Verbals, and Phrases & Clauses. In every topic that is covered, care has been taken to go into only as much depth as is required for GMAT aspirants. With basics of English in place, the book then covers each of the topics that GMAT specifically tests on: Subject-Verb, Pronouns, Modifiers, Parallelism, Tense, Ellipsis and writing style. In each of these topics, extensive examples have been provided from the most authentic and current "official" sources of GMAT (including GMAT Official guides, GMAT Verbal Supplement and Official mock tests).