
Book #121 in the The Hardy Boys series
Can the Hardys solve a kidnapping linked to a mysterious notebook in a fiery mining town?
Frank and Joe Hardy face a puzzling case in Ridge City, a mining town plagued by underground fires. Garth Trimmer's sister, Liz, is kidnapped, and a cryptic letter demands a mysterious notebook for her return. As the Hardys delve into the town's secrets, they must uncover the notebook's significance and save Liz before it's too late. What dark truths lie beneath Ridge City's burning surface?
After Garth Trimmer discovers that his apartment has been ransacked and nothing of value stolen, he calls on the Hardys to discover who was responsible. While looking over the mess a letter arrives by courier telling Garth that his sister has been kidnapped and that if he wants to see her again he is to bring “the notebook” to the covered bridge in Ridge City, Pennsylvania by midnight that night.
What notebook was the letter writer referring to and what is going on in Ridge City, an abandoned mining town with underground fires running rampant? It is up to Frank and Joe Hardy to figure out.
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