Ius 16 - Is There a Paper Theme in Books?

There's going to be a paper background in books. It makes me wonder if visual customization inside aps may be even outside of aps, given what gugl announced. Also, the ui in books for customizing the u i, that card that pops up from the bottom of the screen, i wouldn't be surprised. A bunch of developers ive confirmed, like, had the same theory. I've seen on twitter. If that's one of the news wifti changes, like a news wift iapi in in is 16 beeng able to do those bottom based cards? And it's a lot of developers have been asking for a swift, two ey version of