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The Secret of the Old Mill has many intriguing parts about the book. It feels like I am with them solving the mystery. The book starts out with action as the Hardys receive a threat letter. The next day they see the same bike the guy who gave the threat letter was on at a company called Elekton. They realized it was their friend's, Ken Blake, bicycle. They asked a security guard where Ken Blake was and he said out on errands. On their way to leave, they saw Ken Blake in a old mill window. One of the things that this book does great about is suspense. The Hardy Boys were attacked and put on their boat at sea when they were trying to search for clues in the mill. The novel is great about having a balence between dialogue and action. They talked to Ken Blake and got some information about Elekton. When they went back to the mill, they found a secret room. They found counterfeit tools in the room. Some employees there confronted them and captured them. The police found out and arrested them. This book is well balanced all around. I loved the suspense and plot. I recommend this book I suggest you buy it.

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The Hardy Boys found the archer's finger guard. They could trace back the arrow to see who it belongs to. Unfortunately, they didn't find anything but the clue led to less suspects.

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The Hardy Boys and Chet saw the same green truck that tried to kill them and their friend Ken Blake at the Elekton area. The plant wouldn't let them go near the car at all. It makes them convinced that the mysterious person is from Elekton.

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The Hardy Boys went with Chet to his job interview. Elekton said there was no job openings and were secretive. They saw the same bike that left the threat note at their house. Frank had figured out that when they almost got hit by an arrow and were near suspicious activity, they were near the Elekton area. The Hardy Boys think that they were attacked and were sent the letter by an Elekton employee.

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While looking at the second threat note under a microscope, they found a watermark. They could track down the five pointed star watermark to see where the paper came from. The company let them have a look at the paper with the people who had the paper. It narrowed down their search for a suspect.

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After getting a letter to their Dad saying drop the case or else, they see a guy speeding off on a bike. The Hardy family start looking for clues and they found a bicycle pedal. It turned out to be a unique Belgian pedal to a Belgian bike, which only few people have. This clue sets the whole mystery in motion.

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Chet is a friend of the Hardy Brothers and helps them with their mysteries. He is also one of the main protagonists in the book. He is known for being bigger and his constant huge appetite.

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Joe Hardy is one of the main protagonists in the book and is the younger brother of Frank Hardy. Just like his brother, Joe loves to solve any mystery. He is 17 and blonde. Unlike his brother, he is quick acting and jumps to conclusions.

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Frank Hardy is one of the main protagonists in the book and is the brother of Joe Hardy. Frank is 18, dark haired, and loves solving mysteries. Frank likes to think things through and use logic to connect clues.

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3 Main Characters