Hello, I am doing a "graphic novel" type book thing for my asian culture project about the Japanese language. I am writing it from right to left page wise, and on the back (or the front to us Americans), I want to right "This is not the front cover," in a formal manner. Through research and a Japanese dictionary I have come up with this: "これは表紙ではない。" So far I have found no flaws for it, but I want to double check: Is this correct? The word that I am most unsure about is 表紙 (hyōshi) to refer to the front cover of the book. Thanks in advance!