SOLVED. Fiction: book series of girl looking for her sister but finds dark forces are taking over humans. She can see the aliens but other humans cannot. [s]

[Sophie]

Girl looking for her sister end up in a foggy part of the town and takes refuge in a book store. She can see the aliens under the disguise of human and will fight to find her sister and fight the aliens and gods taking over.

[Lobstergirl, au gratin]

Sophie, as you saw in the popup box when you posted your comment, please tell us around what year you read the book. This makes your query a lot easier to solve.

[Sophie]

2 years ago I believe.

[Teri-K]

Darkfever by Karen Marie Moning? It's the first in a series.

[Sophie]

Yes. This is it. Thank you!