The book seems fake, unofficial, (illegal?). This due to no indication of where it has been printed, the revision number, year, or any additional page with infos about to the editor.
The paper is of very poor quality, you can noticeably see the ink on the other side of the sheet, that is very disturbing while reading.
The inside margins are too thin, requiring a hard opening of the book in order to read the internal part.
Took 40 days for delivery.
I reminds the words of the seller: "Quick Delivery(5 to 15 Business Days)... Excellent Quality...".