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It’s 1913 and young heir Sebastian’s life hangs in the balance at Penworth House. But all is not as it seems. Can the time-travelling friends unravel the mystery before it’s too late…?
Embark on an unforgettable journey in Book 3 of the international bestselling Secret Lake mystery adventure series.
Winner of the 2025 UK Selfies Children’s Book Award! 🏆
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Description
Embark on an unforgettable journey in this new page-turning time travel adventure for ages 8-12+ Book 3 in the international bestselling Secret Lake mystery adventure series
When Tom and Stella find a 100-year-old letter from their Edwardian friend Jack, his plea for help leads them and their friend Hannah back down the time tunnel to 1913.
There the adventurers reunite with friends Lucy, Emma and Sophie at the grand Penworth Estate – unaware of the danger that awaits. Young heir Sebastian has fallen mysteriously ill, and tensions are running high in the household.
With secrets lurking in every shadowy corner, it’s up to the friends to unravel a dangerous mystery that threatens Sebastian’s life.
Can the time-travelling detectives expose the truth behind Sebastian’s illness before it’s too late? Will the villain at Penworth succeed with their deadly plans?
Beyond the Secret Lake is packed with twists, turns, secrets and danger! Perfect for fans of middle-grade mystery, and anyone who loves history, old houses and daring adventures.




