The Witch’s Heart by Genevieve Gornichec

Angrboda’s story begins where most witches’ tales end: with a burning. A punishment from Odin for refusing to provide him with knowledge of the future, the fire leaves Angrboda injured and powerless, and she flees into the farthest reaches of a remote forest. There she is found by a man who reveals himself to be Loki, and her initial distrust of him transforms into a deep and abiding love.

Their union produces three unusual children, each with a secret destiny, who Angrboda is keen to raise at the edge of the world, safely hidden from Odin’s all-seeing eye. But as Angrboda slowly recovers her prophetic powers, she learns that her blissful life—and possibly all of existence—is in danger.