The Hardy Boys' Mysteries #13: The Mark on the Door Author: Franklin W. Dixon Retail Price: $6.99 Our Price: $5.49 Save: 1.50 (21.46%) Availability: In Stock        The search for the meaning behind a mysterious symbol that terrorizes the people of an entire village, a daring escape from a submarine, perilous encounters with a band of renegade Indians, an unusual smuggling operation- all combine to make this one of the Hardy's most exciting cases. Recommended for ages 8 to 14. Similar Items you may enjoy! The Hardy Boys #13: The Mark on the Door Author: Franklin W. Dixon Our Price: $13.99 The Hardy Boys' Mysteries #61: The Pentagon Spy Author: Franklin W. Dixon Our Price: $4.99 The Hardy Boys' Mysteries #2: The House on the Cliff Author: Franklin W. Dixon Our Price: $5.49 The Hardy Boys' Mysteries #3: The Secret of the Old Mill Author: Franklin W. Dixon Our Price: $5.49