User blog comment:Omega natsu2/Episode 176: The Dragon King, Review./@comment-24536822-20140406201326/@comment-7418318-20140407102112

Even if that's the case (of which I'm still not convinced), the looks of the two (or one) book is really the least important point in the whole argument.

Besides the anime does show the cover "uncovered" and it was just completely plain. Sure we havn't yet seen the journal in the anime, but so far the new anime team was quite faithful to the manga designs.