This book is on grammar, but it goes beyond grammar. Because by knowing the elements of grammar and the rules in putting them together, one can at best follow a text, but cannot communicate. One needs to cultivate language sense, develop understanding of language use, and learn to handle the tools of logical analysis. Logic helps. This book is a paradigm of reasoning and analysis, and it makes clear that anything that is logically invalid cannot be deemed grammatically correct. For example: "I say I am dumb" and "I am there." Being aware that a clear, correct, complete, and consistent write-up is a basic requirement in a professional career, the author designed this book to serve as a master key to unlock the door to the house of grammar. The book teaches how to handle tools of analysis for clear thinking, which is important because clarity in expression goes hand in hand with clarity of thought. Varindra Kumar Varma is an acclaimed Hindi writer who holds a degree in law and a doctorate in philosophy. He specializes in linguistic philosophy, and worked as a senior research fellow at a centre of advanced study in philosophy. He was a professor of philosophy for years, and retired as a principal from higher education service. Dr. Varma has researched the logic of language, the role of logic in grammar, and methods of exploiting the native learner's knowledge of his mother tongue in learning English. He published two books on language and grammar in English and one in Hindi. Publisher's website: http: //sbpra.com/VarindraKumarVarma