Tunnel at World's End, also written for young children, is the sequel to Search for the Sage.

You can read a synopsis of Tunnel at World’s End here.

Sanjana’s illustrations continue to work their own magic in Tunnel at World’s End.

I added a fourth character in Tunnel at World's End, and called him Toby after Mary’s oldest nephew.

As you can see, the Sage was puzzled by who exactly Toby was and where had come from!

By then my first three children had put in an appearance, and that is why Tunnel at World's End is dedicated to "Philip, Michael and Sarah, who went there second."