Moon-Bright Tides (Lunar Requiem, #1)

The night sky is very dark without a moon, and there hasn't been one for decades. Without one to govern the oceans, it falls to Riven, reluctant sea-witch, to sail out alone every night across the midnight ocean to cast a spell to call in the tides.

She hates it. Hates the moonless dark, hates the endless deep, and hates the fact that without a witch to sing in the tides, sea and land alike would fall to ruin. Riven faces her worst fear every night for years - until she meets a mermaid. Her ...