The compass may still hold some importance to the narrative, but I think Yarros teased another way for Violet to find Xaden ...

A girl in a mechanics workshop meets a submarine captain who owns a magical compass. The compass is not functioning, so he asks her to fix it. It turns out that the compass has showed him the way ...

Microscopic in size, the magical dust--discovered in the vast Arctic expanse of the North--was rumored to possess profound properties that could unite whole universes. But there were those who ...