ABANDONED. Fantasy book, one weird boy was found near this enclosed area and he lived there for a while. The girl and the boy fell in love, but the boy isn't human. He's from another universe.

[Karmen]

Hello, I have a problem.. I don't remember the title or the author of one fantasy book. I'm going to describe this book a little, so maybe someone knows and could tell me the title of the book.
There are people who live in an enclosed area, there were walls around this area if i remember correctly. There is one girl who is one of the main characters. Her father is a ruler of this place. The girl has a brother but he is missing, nobody knows where he is. One day one weird boy was found near this enclosed area and he lived there for a while. The girl and the boy fell in love, but the boy isn't human. (I don't remember who he was, but he could change into bird or some kind of animal) The boy is from another universe and he goes back there. The girl follows him. Long gone brother returned home. The parallel universe is dangerous for people, because of the creatures that live there, so the boy hides the girl.
I hope some of you have read this book, I would really appreciate it if i found it again! Thanks

[Lobstergirl, au gratin]

Karmen, please read the group pointers/rules at the top of the group homepage - which explain what to put in your header.

We also need to know when you read the book.

[Lobstergirl, au gratin]

Karmen, are you still looking for this or did you find it?

[Kris]

No response, moving to Abandoned folder.

Karmen (OP) was last active on the site in June 2019.