Five on Finniston Farm by Enid Blyton

The Five visit Finniston Farm, where rumors of a lost castle and hidden treasure stir up excitement. Tensions rise when a pair of American antiques dealers arrive, eager to dig up the land for profit. The children explore the farm’s history and search for the lost dungeons believed to hold valuable artifacts. With help from a local boy, they uncover secrets buried deep underground. The story blends countryside charm with suspense and historical mystery.