This book can more be better than their current expression.This book should have to be add the picture of chemical reactions.The language which is used in this book should be more easily than Current language.Because students wants easy language to read the topic so you have to use easy language.And another correction is length of topic.The length of topic is very much lengthy hence you should have to take a decrement in a length of each topic in this book.The main negative point of your book is representation of topic.The representing of any topic is not impressive.Hence you have to increase the representation of topic in impressive way.these things which I described Above.you can improve your book in future.thank you.