Flame of Sevenwaters by Juliet Marillier — book slip

Maeve, daughter of Lord Sean of Sevenwaters, returns home after ten years, carrying the scars of a childhood fire. Though her body has healed, her spirit remains fragile.

Sevenwaters is in turmoil as the fey prince Mac Dara demands his son return to the Otherworld, resorting to murder to force Lord Sean's hand.

When Maeve discovers a body in the woods, she and her brother Finbar embark on a perilous journey that could end Mac Dara's reign or lead to their deaths. Success might open a future Maeve never dared to imagine.