Matty thought the scrapyard had revealed all its secrets... he was wrong.
When a hidden entrance beneath the workshop floor leads to a mysterious underground lab, Matty, Spark, and their friend Bex discover something far bigger than they ever imagined.
Strange technology. Hidden messages. And a past that's been buried for a long time.
As they explore deeper, the lab begins to reveal its secrets - but not without consequences. The more they uncover, the more they realise just how powerful - and unpredictable - it all is.
Now, Matty and his friends must work together to understand what they've found before things spiral out of control.
Packed with mystery, adventure, and heart, Matty and Spark: The Hidden Lab is the exciting second book in the series - perfect for young readers who love action, friendship, and a touch of sci-fi.