This story is about three children finding a map. These children find out that it is a treasure map. When they try to find it they figure out that other people, evil people, want to find it too. This book is called Over Sea, Under Stone. The author is Susan Cooper, Illustrated by Margery Gill.

This book takes place in a town called Trewissick. Trewissick is a town by the sea. It is a very old town.

The characters in this story are Jane, Simon, Barney, Great Uncle Merry, and a group of evil people. Jane, Simon, and Barney are the three children that find the map. Great Uncle Merry is the childrens uncle. The group of evil people are the group that Jane, Simon, Barney and Great Uncle Merry are fighting against.

The Theme is good against evil.

First, they were on a train going to Trewissick. Then they went to the Grey house. Then they were playing and they found a treasure map. After that they went to find it.
The problem is the evil people were convinced that they would find the treasure and win once and for all.

So if you like Susan Cooper or if you just want to figure out what happens, READ IT!