So, there are TONS of editions of Defoe/Johnson "History of Pirates". I think this is the most accurate. First of all, ALL biographies are included, and every biography is enriched with all the further details added along the three editions of the original Johnson's book: 1722-3-4. So, just this is definitively an added value.
Then the language. The original language is completely preserved. Even if it is now as easy to read as other editions are, it is definitively the most accurate edition.
This is the book that you have to use if you are using Defoe/Johnson in academic or you need the most authoritative edition among the others.
Highly recommended to all those are working in academy or simply want to be accurate in their writings.
If you are looking for something that it is a pleasure to read, just a stories and not a history book, it is better for you to look over some other simplified editions. If you want to face some 18th century's English, and you want to enjoy the book as it was published, this is definitively your book.
Salvatore Poier, PhD