The Promise Witch (The Wild Magic Trilogy, Book Three) by Celine Kiernan

“Ireland's answer to JK Rowling.” Sunday Independent "One of the best Irish books of all time." TV3AM“A classic hero in the making.” Parent TalkFrom twice-winning author of Ireland's CBI Book of the Year AwardIn the third book in The Wild Magic Trilogy, Witches Borough is dying, and no one knows how to save it. Into this scorched landscape, storms a raggedy witch named Magda, trailing ashes in her wake. She wants Mup.