Download or read book The Mystery in the Old Mine written by Franklin W. Dixon and published by Turtleback Books. This book was released on 1993-01-01 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frank and Joe Hardy travel to the coal mining town of Ridge City, Pennsylvania, where they try to find the reason for the kidnapping of Liz Trimmer, a woman working to protect the city from underground fires.