The Marauders' Island - Tristan J. Tarwater - Bog

Azria is a mage of Miz, trained to wield the magic her country is famous for. When her estranged mother, alleged pirate Captain Apzana of the Hen & Chick, shows up on her 16th birthday offering her adventure, Azria leaves the life she knows for the promise of riches, renown and danger at her mother's side. But more mysteries than answers surface when Apzana reveals why she's called on Azria after years of absence: the treasure of the Marauders' Island, an island sunk into the Sapphire Sea generations ago by the infamous mage Iyzani. If Azria can raise the island, the score of a thousand shores will be theirs for the taking and she'll secure her place among her mother's crew. But when Iyzani emerges from the shadows to stop them, Azria must summon her power and navigate the waters of revenge and ambition.