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About a month ago, I stumbled across a fifth version of the book at a Goodwill. I found this book very good for me to learn vocabulary, so I searched the Public Library catalog and checked out the 7th version of the book which is the one I am reading every day now. I like the book because the essays are short and the example sentences also include some good words. I cannot finish the book in 21 days which is the maximum checkout time of our library, so I bought the book. I am happy to discover this book.