Siren Bound by E.M. Rinaldi

Her soul died beneath the waves…

Rani Whitmore used to be human. She used to be a lot of things: carefree, happy, safe. Now her reflection is barely recognizable, her beloved escape is her personal hell, and her skin fucking glows when she’s upset.
Trapped at a secluded beach house all summer, she needs to learn how to control her new powers if she ever wants a chance at going home again. Enter one blonde, cocky, presumptuous witch who’s supposed to tutor her on all things supernatural. Ignoring him is easy at first, but as her panic attacks eat away at both her mind and body, it’s becoming increasingly obvious that she needs his help. Somehow, his touch anchors her, but the thought of letting him in is terrifying.
How can she seal the cracks in her armor when he’s always right there prying them open again?

He’s the monster so no one else has to be…
Ruthless interrogator and chosen second to the witch faction heir, Ezra Alantes is really fucking good at his job. Usually. But one semester from hell was all it took to make him question his abilities and whether or not he’s the best person to protect those he loves.
The one upside? He’s found his bond. Human turned siren, Rani is enticing and frustratingly defensive; a true mirror to his battered soul. What’s more, she needs his help, and training her this summer might just be his opportunity at a second chance—self doubt and loathing aside.
Throw together some vengeful enemies, a spicy hellion intent on escaping, and enough sexual tension to keep him permanently hard…convincing Rani to give him a shot while trying to keep her alive should be easy…right?