BR:1-7 Dutch Adventure

Trudy and Chip looked through the window. The man was inside. He had a
knife. He was cutting the cheese in half.
"Why's he doing that?" said Chip. "It looks like he doesn't want anyone to see him."
"Ssh!" whispered Trudy.
Inside the cheese were some diamonds.
"I'm clever," laughed the man. "No one
will find out that I stole the diamonds. The cheese was a clever place to hide
them."
"He's a thief," whispered Chip. "We must do something."

I read a book which name is Dutch Adventure. Dutch Adventure is book in the Oxford Reading Tree series. This is a story about cheese and thief.
One day, father went to supermarket. He took Biff and Chip. They went to cheese counter. A lady was selling Dutch cheese. They bought it four and recieve two cap. They came back home. Biff and Chip went to Biff's room. Suddenly, the key glowed. The magic key took them back in time. It took them to Holland. They want to go village. They began to walk. Then, a horse and cart came along. A boy was driving it. Biff and Chip could ride the cart. They went past a man on a bicycle. At the moment the cart broke. The mangot angry because he had same cheese a boy. The man couldn't understand him cheese. Finally, the man found his cheese and gone. Biff, Chip and a boy puted the cheese in some snacks and started walk. Suddenly, they heard someone shouting. They ran to see what was wrong. Water was spouting through the dyke.They helped the girl to use the cheese but they want a cheese more. Chip went with girl to find a that man. They found a broken bicycle and looked through the window. Inside the cheese were some diamonds. They called girl's father and villagers and they tied the thief to the windmill. After that, villagers mended the dyke. Then, the magic key took Biff and Chip home. The adventure was the end.
I was surpised the end of this story. I didn't know the thief has some diamonds in the cheese. Although the thief had hidden the diamond into cheese, he admired for a while.

Hunt, R & Brychat, A. (2003). Key Trouble. Oxford University press. 380/3672