This document provides an introduction and overview to a book about advanced English grammar. It includes:
1) A preface stating that the book is designed to facilitate advanced English study using English as the medium, covering listening, speaking, reading, writing and grammar structures.
2) A list of abbreviations used in the book.
3) An outline of the book's contents which covers topics like sentence structure, sentence patterns, parts of speech, clauses and punctuation.
4) A concluding biography of the author.