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Title: If you are serious about your English vocabulary buy it!
Review: The book will help ESL students extend their vocabulary. The format is very efficient - even pages contain the material, odd pages contain the exercises. The book has 100 units and every unit explains a unique phenomenon of the English language. The Index encounters about three and a half thousand English words which for me is quite a lot. You will find six units on idioms, a unit on slang and much more. The book is for upper-intermediate and advanced students. If you are just a beginner, look for books with the same title for beginners or intermediate students.
