Being a fairy is a lot more dangerous than you think . . .

There's a strange magic to London's parks. When the sun sets and the gates are closed, tiny winged creatures come to life. The only way to meet them is to become one. And if you become one, there's no way back.

Rowan cries herself to sleep in Hyde Park and wakes up ten centimetres tall, with tiny oak-leaf wings. She's about to go on an adventure in the hidden world of fairies and foxes. But Rowan's quest will be perilous, with fearsome enemies at her heels. If she wants to get home, she'll need to find the courage she never knew she had, and discover powers she'd never even imagined . . .