Hurrah! We go to the Crystal Cave by: Drasti Chauhan

Julia and Peter go to meet their friends, Lucy and Sam, at the Mariana Beach, for a birthday party and there they walk right into an adventure.
The children go in search of a treasure hidden somewhere in a cave named THE CRYSTAL CAVE. They also find out that someone else is after the treasure too.
What will happen next? Will the children be able to find who is after the treasure? Will the children find the treasure before that unknown person?