I see, but I can't say I see where they got that from. The magazine only says that the middle books are about "animals that exist in the real world," I don't really see where the holy thing comes from.

The only explanation I can think of is maybe the 生物 (living things) mixed them up somehow? Since 生(living) and 聖(holy) are both "sei." But that seems more like a mistake you'd make if you didn't have the kanji. It's kinda perplexing.

Without focusing too much on the wording, I think it will be easy to just categorize the books into mythical beasts, actual animals, and heroes of lore.

If the kanji means "living things" instead of "sacred animals", then perhaps that extends to ninjas, pirates and roses, based on how the Full Bottle gimmick worked?

Mythical beasts are on the right, living things in the middle, and heroes of lore on the left. While primarily living things will most likely consist of fauna, I do agree that there is possibilites for it to also include flora such as roses. As for ninjas and pirates that is already handled on the heroes of lore books so most likely no since we already know that Sasuke Sarutobi Wonder Ride Book will be a thing. Pirates I guess maybe if they can find a heroic pirate in literature which I cannot think of. Captain Marvelous I guess? :lolol

I hype for all of Saber it Ryuki 2.0.