The Singing Tree — Bruce Donehower

When Hannah's father leaves to discover the last unknown country in the world, Hannah finds her life changed forever. Seven years pass without any news. Then, on the day of her thirteenth birthday, Hannah receives a strange gift. To understand the gift's meaning, she must recreate her father's quest. She is threatened by an enemy determined to destroy her. Only when she meets a Master of Memory and the Master's strange apprentice, who teaches her the art of hovering, does she find her way to the Singing Tree, which is the key to the deepest riddles of her destiny.