Whispers of the Deep (Volume 1)

Summary:

As one of the many engineers who keep Beta, the city beneath the sea, running, Mira wants only two things: for her family to be proud of her and to prove herself.

But then, during a solo mission in an abandoned part of the city, she encounters a monster – an Undine. A dangerous merman from a long-forgotten civilization.

Arges has fought for his people his entire life and plans to wipe out Beta once and for all to protect his kind. But when a human woman saves him, she unwittingly creates a connection between them that he can't ignore. So he kidnaps her. Holds her captive. Provides for her. Only to realize that their bond goes far beyond that between captive and captor…