The Shark Caller: Zillah Bethell

Dive beneath the waves with this spell-binding adventure of friendship, forgiveness and bravery, set on the shores of Papua New Guinea, perfect for fans of Katherine Rundell and Eva Ibbotson.
"I want to be able to call the sharks. Teach me the magic and show me the ways."
Blue Wing is desperate to become a shark caller, but instead she must befriend infuriating newcomer Maple, who arrives unexpectedly on Blue Wing's island.
At first, the girls are too angry to share their secrets and become friends. But when the tide breathes the promise of treasure, they must journey together to the bottom of the ocean to brave the deadliest shark of them all...