Maisie Hitchins - The Case of the Secret Tunnel

Maisie Hitchins longs to be a detective. She's sure that there are lots of mysteries to solve on the streets of Victorian London.

Gran has a new lodger and Maisie suspects there's more to him than meets the eye. Fred Grange says he works for a biscuit company, but he is out at odd hours, and knows nothing about biscuits!

Determined to uncover the truth, Maisie is drawn into a mystery that takes her deep underground...