Heart of the Volcano — Imogen Howson

Caught between love and duty, can she make an impossible choice?

Five years ago, Aera was called away from everything she had ever known: her home, family, and Coram, the boy she was growing to love. She was given no choice. As the only living lava-shifter -- able to transform her body into molten rock -- she is destined to serve the volcano god as his fire priestess. Now, before she takes her ordained role, she must face her final test. Execute a criminal sentenced to death for the most unforgivable of all sins. Blasphemy.

She's shocked to discover it's no anonymous law-breaker waiting chained at the center of the labyrinth. It's Coram. For the crime of being a gargoyle, a winged stone-shifter. A gift akin to hers…except his gift is unsanctioned by the temple, his powers proclaimed unholy.

If she refuses the test she will betray her god and condemn her family to dishonor. To pass it she must kill the boy she used to love…the man she still does.