Tide of Waves and Secrets by C.L. Mecca

A daring spy. A rebel princess. A kingdom on the brink of war.

When a mysterious human, Sir Rowan arrives in the immortal realm of Thalassaria seeking the legendary Tidal Pearl, Thalassarian guard Nerys is assigned as his escort and to keep close whilst he’s in the palace. But her duty wars with her desires as the more time she spends with Rowan, the harder it becomes for them to ignore their growing attraction. Powerful, enigmatic, and devastatingly mortal, Rowan stirs something deep within her that could change the course of her future.
Trapped within the palace while the queen decides the humans’ fate, Nerys realizes her allegiances are shifting. With the tidal pearl at risk, there is only one way to protect it… by challenging the Queen’s crown. But as the moment approaches, Nerys and Rowan are forced to confront a choice between loyalty to their realms or a love that defies the laws of mortality.