Starseed

Dark spirits cling to wounded victims-but only teenage outcast Maya can see them.
Maya Voss lives alone in a world of shadows after her parents' divorce. No one else can see the nightmarish creatures wrapped around her dad's leg, the savage silhouettes surrounding her mom's heart, or the inky tentacles coiled around her friend's throat. That is, until she meets Cay, a boy who's just as strange as Maya.
Before long, their passionate connection is put to the ultimate test when it breathes new life into a vengeful, unearthly presence. Strengthened by Maya and Cay's powerful bond, insidious spirits force their way inside people's bodies and commit horrific crimes, sending humanity spiraling toward a devastating collapse.
Now, the same frightening magic that turned Maya into an outcast is her only hope to save the human race. But it takes two to wield her risky powers to the full-or to die trying.
If you're charmed by the dark magic of Michelle Madow, Jen L Grey, and Stephanie Meyer, then you'll devour the first supernatural adventure in Olivia Hillier's young adult paranormal romance series.