I will present you a few ideas that helped me to reach this conclusion.
He first check the date comments "22 June 2013" for both of them. The book was published on June 18, Amazon, or four days before the comment which is absolutely not allow time to receive it, let alone read it. However, note the ability of subterfuge, students going on holiday will go buy an explanation of the court on amazon, and will definitely book with the best notes.
The 2nd reason that allowed me to deduce this conclusion is other comments from people who wrote the glowing reviews on this book. These comments apply to all other books that have nothing to do with scientific prépas but are written by the authors of this book (especially "New Lexicon of Greek: Thematic presentation, language and literature, and accentuation of the Constitution words ").
I leave you now appreciate the other comments on this page which lets show through honesty and sincerity of the authors of any kind.
Of course I could be wrong and I apologize if that is the case, but it seems unlikely.