I remember a story with a young woman who lives (maybe not all the time) in a big old house in England that is described like an English "Manor". Her little sister/brother is sometimes with her but is kidnapped at some point in the story (?).
She goes to a parallel world where people are figures from books or books itself. She has a (living, running or flying) book herself which enables her superpowers or doing magic. One portal to this world is a big real world bridge.
In this world is a forest, where dead books are buried and are seeds for the trees. At some point the young woman is living or hiding in some tree houses with a lot of other people. (20-50?)
Also there is a house of glass where there stands a tree on which all bookmarks would grow. I remember a big ship made of paper. And one female person's torso is able to be opened like a book, so she wears a corsage to avoid this. It was not usual in this world.
I think I read it as a real book, but I also read a lot of e-books. It would be in the last 5 years and it was an actual book I think. It was in German language.
The ship is one of those traditional ships with big wheels on the Mississippi. The young woman and her magic book somehow make it fly.
It is possible to travel via book in the real world. One needs two books of exactly the same year, printing and so on. One could teleport from one of these to the other and then they are destroyed.