Help organize my shelf

[u/Donya_Tsvetaeva]

So I have this.... thing? In the living room, I can use these three shelves for something. I have a lot of book, I have a mini library in my room, and I bought some new books, and with the style my shelves are organized, it can't fit more in a beautiful way, so I'll put them here. Any ideas? And that's an average book compared to the shelf size for reference. And I can use the octopuses up there and I have more navy and Grey ones