In this children's adventure novel, a group of four friends and their loyal dog reunite for the Christmas holidays and find themselves embroiled in a mystery involving an old map and a secret passage. When a tutor arrives to help one of the children with his studies, the group becomes suspicious of his intentions. Their curiosity and bravery lead them to uncover a hidden treasure and thwart the plans of nefarious individuals. Through teamwork and courage, the quintet solves the puzzle, ensuring a happy ending to their second thrilling escapade.

The 5170th greatest book of all time