I expected this book to be an Arthurian fantasy – but instead it was an adventure set (mostly) in an alternate modern-day England. Arianrhod (who prefers to be called Roddy), the daughter of a weather wizard, accidentally turns up an evil plot in the middle of the King's Progress. But everyone seems to be convinced that since she's a kid, she's got things wrong – and that the Merlin, the King's main adviser, must be incorruptible and above reproach. Attempting magic to summon wizardly help, she contacts a boy from another realm altogether... but Nick, although he'd like to learn magic, is rather lost himself.
This YA novel was a thoroughly enjoyable book – I liked it MUCH better than Fire and Hemlock, the last book I read by Wynne Jones. It's a must for any fans of her Chrestomanci series.