Your ability to communicate clearly and share thoughts, feelings and ideas will help you in all your relations with other people. As a student, you may study any language, but it is important that you are able to read, write, speak and listen well in order to communicate properly. Speaking more than one language can help you to communicate well with people around the world. Learning English can help you to communicate with people who understand English besides the language you have been exposed to in your family, for example, your mother tongue.
Back in the early days of pre-globalization, knowing English was a plus. Like it or not, it was a mark of superior knowledge and sophistication. It made you look impressive to people. Now, regardless of your background and upbringing, many bosses will automatically expect you to know the language. Even if you received education in a different language or come from a place where English is barely spoken. Today you are expected to know English. This means that in order to impress your interviewer or boss now, you have to show that you are extremely fluent and competent in both speaking and writing the language.
This book will certainly be of help to you in the pursuit to improving your English communication skills.