The Fiery Heart (Bloodlines #04)

Sydney always believed that alchemists were born to protect vampire secrets and human lives - until she met Marcus and turned her back on everything she once knew.

But she's not free yet. When her sister Zoe arrives, Sydney can only tell half-truths about her past. And with every word she risks exposure - and the fatal consequences.

Consumed by passion and vengeance, Sydney must choose her path once and for all. Even if that means harnessing her magical powers to destroy the way of life she was raised to defend . . .