12 Books Found

Based on your description:

"A girl lives in a big house with lots of secret passages but her parents don't know about them. She meets a boy and doesn't like him, but they end up having to work together and she sneaks him around the house in the passages. She has a mosaic path and a buddha statue in her back yard and he discovers a secret tunnel underneath the statue. I know that it isn't the secret garden or anything similar."