From Maggie O'Farrell, the multi award-winning author of Hamnet, and the stunning imagination of Daniela Jaglenka Terrazzini, comes a hopeful and powerful new book, based on Maggie's own experience on living with a stammer.

Sisters Bea and Min couldn't be any more different - Bea is neat and tidy; Min is messy and mucky. Together, they are a perfect pair because Min loves to chat and Bea loves to listen. And in their happy differences, they share the attic room at the top of their very tall, narrow house. Then, one day, as Min is chatting, her tongue feels suddenly locked. The words forming in her mouth never make it out.

Some days later, still struggling to speak, she sees the most extraordinary thing at her shoulder in a mirror ... a creature, a thing, seizing the words as they rise to her lips, and cramming them into its mouth. Min continues to struggle with her stammer - how can she truly be herself, when she cannot do what she loves most: chat! Bea is the only one who truly sees, and understands, her.

Together, they go on a journey of discovery - what IS this creature? - and they find not quite a solution, but a way to make peace with themselves and to love and embrace what makes each of them different.