This beautifully illustrated story is an adaptation of the Welsh legend of Cantre'r Gwaelod, the lost area of Wales which disappeared beneath the sea. This drowned land was once a pleasant and prosperous kingdom, its low-lying fields protected from the waves by a high sea wall. But only Mererid, the storm child, knows that the tide-gates are failing and the next storm will breach the wall. As clouds and ravens gather overhead, she must race to save her friends and the kingdom before it's too late... TreeTops Greatest Stories offers children some of the world's best-loved tales in a collection of timeless classics. Top children's authors and talented illustrators work together to bring to life our literary heritage for a new generation, engaging and delighting children. The books are carefully levelled, making it easy to match every child to the right book. Each book contains inside cover notes to help children explore the content, supporting their reading development. Teaching notes on Oxford Owl offer cross-curricular links and activities to support guided reading, writing, speaking and listening.