Burn — Paula Weston

Suddenly, Gaby remembers everything.
For a year she believed she was a backpacker chilling out in Pandanus Beach. Working at the library. Getting over the accident that killed her twin brother.
Then Rafa came to find her and Gaby discovered her true identity as Gabe: one of the Rephaim. Over a hundred years old. Half angel, half human, all demon-smiting badass and hopelessly attracted to the infuriating Rafa.
Now she knows who faked her memories, and how - and why it's all hurtling towards a massive showdown between the forces of heaven and hell.