Pirate captain Lucius has killed more men than he can count-and felt nothing for any of them. Then he pulls a drowning woman from the sea and discovers she isn't a woman at all.
Celeste is a moon goddess, cursed for falling in love with a mortal and condemned to twenty-eight days of borrowed humanity. Before the next full moon, she must complete an impossible ritual on a forgotten island or lose everything she once was.
Lucius has never believed in gods, curses, or destiny. But as his ship sails through haunted seas, cursed straits, impossible waters, and the wrath of the heavens, disbelief becomes a luxury he can no longer afford. With every league they cross, Celeste's borrowed life grows weaker, and the cost of saving her grows higher.
As the days slip away, Lucius realizes the greatest danger isn't the monsters beneath the waves or the gods determined to reclaim Celeste-it's loving someone he was never meant to keep. To save her, he'll challenge powers no mortal has ever defied, knowing that even victory may cost him the one person he's willing to lose everything for.
The Moon's Promise is a sweeping romantasy of pirates, ancient gods, impossible choices, and a love destined to end before the moon is full, unless fate itself can be changed forever.