“What was that?” asked Ethan, surprised.

“I’m . . . not sure,” Ella replied.

She pressed against the wall harder. It creaked some more, then gave way. There was a hidden door!

On the other side of the door was a small room. The three of them rushed in. In one corner of the room was a tall pedestal. On top of the pedestal was a leather-bound notebook!

“We found it!” Ethan cried.

Suddenly Dimitrios grabbed the notebook . . . and started running!