I came through this book in last year. Beleive me its amazing, no matter at what level of English you are! But after reading it, you will have a lot of confidence over English.
Grammar part is well defined in easy language with examples. Vocab part is good too.
Meanwhile a good book for understanding everything about basic grammar, vocab, compherension.
I would like to recommend all of you if you are aspirant of any competetive exams or just want to improve your English.
Personal rating : 4.5/5