The book displayed in Option B is counterfeit.
Examining the glue used to bond the book together can be a useful method for determining a book’s authenticity. Often, counterfeit books will use a different color glue than that used for a legitimate book.
Additionally, the glue applied to counterfeit books tends to be applied more thickly and generally does not appear to be as tidy as that applied to a legitimate book.
In the side-by-side comparison the color and tidiness of the glue helps identify the counterfeit book (right).
