Tides and Scales. Realm of the Undersea, #4

Some bonds are stronger than the seas that divide them... Azura has spent years as a spy and prisoner, but freedom comes at a cost. Blackmailed into one final mission, she must return to her underwater homeland of Althea-a place she vowed never to see again. What begins as a dangerous homecoming spirals into a journey of self-discovery when Azura forms an unexpected bond with her childhood friend Erik.
As her dormant powers awaken during her dawning ceremony, Azura must learn to control abilities that could destroy everything she loves. But their rare soul bond is more than an aberration-it fulfils an ancient prophecy. When a vengeful goddess seeks to harness their connection, Azura and Erik discover they stand at the centre of a transformation threatening the very foundations of their magical realms.
With boundaries between worlds crumbling, can a mermaid spy and her bonded partner fulfil their destiny, or will the seas claim everything they hold dear?