The whimsical nature of this is classically Valente; you can tell it was written by her, if you’re at all used to her style, but the style is less pronounced — it requires less concentration to be rewarding, to be enchanting. Which, given that it’s essentially a young adult book, makes sense. It’s still gorgeous, but more like cream and less like treacle.
It’s exactly as charming as the cover copy suggests. There’s a Wyvern who may or may not be the son of a library, there’s wild herds of bicycles, there’s witchery and magic and strange transformations. It’s Fairyland, as dangerous and bewitching as it should be, and not saccharine-sweet at all. It has a bit of the same tone as The Hobbit, with a definite narrator who has a personality and is telling the story direct to you, with the same lightness of touch (and much less moralising than, say, C.S. Lewis). I really like it when people are clever with their narrators, and this definitely worked for me.
There are, of course, deliberate parallels to folklore, but also to classic fantasy fiction — Narnia in particular, and it’s interesting that the main character of Fairyland has a father who is away at war, and so has that war background. Shades of the Pevensies, a little. And the antagonist’s issues, well, they seemed to me a direct commentary on the disappointments of leaving Narnia, never to return.