It is a really good book for you study English. In this book you can study how to speak English and many grammatical points of English language which are very important. This book is more than 40 mb, so it may take you a little long time to download. And the book is also designed for self-study. You can learn by yourself without any teachers to guide you because the book will be a teacher for you.
Sayar Aung Hein kyaw is a famous author and writer in Myanmar, especially for writing English Myanmar grammar books such as this one. Many people know this book and which is why it is popular among English leaners.