Wild magic trilogy (Celine Kiernan)

"On the night that Aunty dies, the raggedy witches come for Mup's family. Pale, cold, and relentless, the witches will do anything for the tyrannical queen who has outlawed most magic and enforces her laws with terror and cruelty -- and who happens to be Mup's grandmother. When witches carry off her dad, Mup and her mam leave the mundane world to rescue him. But everything is odd in the strange, glittering Witches Borough, even Mam. Even Mup herself....

"Third in a darkly enchanting trilogy after Begone the Raggedy Witches and The Little Grey Girl, The Promise Witch opens in a time of heat and thirst. The deposed old tyrant of a queen sent a cursed winter to bury Witches Borough in snow. Months later, the clouds have vanished, but an equally cursed drought has settled over the castle and its river, now bone-dry. Witches Borough is dying, and though Mup is the pathfinder, the stitcher of worlds, is...