It was a story about a girl who lived in a citadel and the world was about to be destroyed and she met a boy named Delos (I believe, but I dont remember her name). Not much to go on but I remember I loved this book when I was young and I have tried everything I can think of to look it up...

It was a story about a girl who lived in a citadel and the world was about to be destroyed and she met a boy named Delos (I believe) but I don't remember her name. Not much to go on but I remember I loved this book when I was young and I have tried everything I can think of to look it up...