A good vocabulary is very important for effective communication. Good vocabulary is essential to properly communicate your thoughts and ideas. You will tested for your vocabulary in entrance examinations and competitions.
Books like Word Power Made Easy by Norman Lewis provides you the roots of words which will help you to learns and master the meanings of new words easily. The book starts with an assessment of your current vocabulary and then introduces the new words with their etymology in a very interesting way. It is a must have for a learner of English language.
Here is a list of books that will help you to improve your vocabulary and these books are available now at discounted rates at Amazon.