SOLVED. YA Mystery. A girl's sister goes missing and shows up again, but there's something different about her. [s]

[Farah]

SPOILERS












The sister goes missing but shows up again. She looks similar to the sister but looks a little different and that is described at some point in the book. The girl knows that the newcomer is not her sister because she had pushed the sister off a cliff into water I think. The story is told in two perspectives I think. The new sister, and the girl who pushed her sister. The cover of it was pretty simplistic I think. Mostly gray with some words on it.

[Becca]

The Stranger Game by Cylin Busby?

[Farah]

Becca wrote: "The Stranger Game by Cylin Busby?"

This is it!! Thank you!!