The Secret of the Hidden Tunnel (Faith Finders)

Matty was devastated when she learnt her father and mother were going to work in Burundi, leaving her behind in a boarding school, instead of her going to the local comp with all her friends. Eventually she settles in the new school, making a special friend, but also an enemy. her new friend is a Christian and helps her to see that Jesus can deal with her anger and bitterness. Together the two friends have an adventure in the school garden where they find an old tunnel and discover the secret it has held for hundreds of years!