With a deft hand and a blazing imagination, fantasy writer Walton mixes genres to great effect. Elements of fantasy, science fiction, and coming-of-age novels combine into one superlative literary package that will appeal to a variety of readers across age levels. After engaging in a classic good-magic-versus-bad-magic battle with her mother that fatally wounds her twin sister, 15-year-old Morwenna leaves Wales and attempts to reconnect with her estranged father. She was sent to boarding school in England, and her riveting backstory unfolds gradually as she records her thoughts, feelings, and experiences in a series of journal entries. An ominous sense of disquiet permeates the nonlinear plot as Morwenna attempts to avoid a final clash with her mother. In addition to casting an irresistible narrative spell, Walton also pays tribute to a host of science-fiction masters as she peppers Morwenna’s journal with the titles of the novels she devours in her book-fueled quest for self-discovery.