The Castle of Tangled Magic by Sophie Anderson
An enchanting fairy-tale adventure about the power of love and courage, from the bestselling author of The House with Chicken Legs and The Girl who Speaks Bear. Magic awaits, all you have to do is believe... When thirteen-year-old Olia steps through a magical doorway, she discovers another land.
A land tangled by magic, where hope is lost, and a scheming wizard holds all the power. Soon Olia learns that she is destined to save this land, but with time running out and her new friends and family in danger, she must search for the magic within herself - to save everything and everyone she loves.