An exciting new adventure series for young readers from Carnegie Medal winner Katya Balen, author of October, October and The Light in EverythingClem and her friends Ash and Zara are members of the Thames and Tide Club! Every weekend they go mudlarking by the river, searching for treasures that have washed up on the shore. Clem has found old things, new things and a whole heap of rubbish. But one day, she finds something really special. Something magical that belongs in the river and must be returned to its rightful owner . or else.Before they know it, the Thames and Tide Club are on the weirdest, wildest, underwater-iest adventure they could possibly have imagined on a mission to save Underwater London!
Read The Thames and Tide Club: The Secret City free for 7 days. £7.99/month after — less than a paperback.








A library hand-picked by an English teacher, delivered through a calm, ad-free app. If your child already loves reading, we keep up.
7-day free trial. Then £7.99/month.
© Copyright 2026 Readingmate Ltd