Grammar to any language is the skeleton and lifeline to literacy. It is the foundation of a language. It determines how words are arranged to form meaningful units.
This book is to help you have a quick guide at your side, ready to dip into section any time you wish. If you learn from scratch, you will gradually build up your knowledge day by day.
However the book is not for students approaching English as foreign language only, but also for native students who rarely think about the structure. Hopefully, the book will make you create confidence and think clearly on constructing correct English.