Jones, Diana Wynne. After the mysterious Chrestomanci adopts Gwendolen Chant and her brother Cat, one of them uses witchcraft to change places with a 20th-century girl. Jones, Diana Wynne. Howl's Moving Castles. In the land of Ingary, such things a spells, invisible cloaks, and seven league boots are everyday things.
Nothing is quite what it seems to be.
Jones, Diana Wynne. The Magicians of Caprona. When an evil enchantress tries to destroy Caprona, two young children and the wizard Chrestomanci join forces to defeat her. Jones, Diana Wynne. A Tale of Time City.