The Secret of the Lost Tunnel
| Publisher | Grosset & Dunlap |
| Series | The Hardy Boys |
| Publisher Series | Hardy Boys Mystery Stories |
| Format | Hardback |
| Language | English |
| Location | New York |
| Copyright | 1968 |
| Pages / Font | 174 pages |
| ISBN | 0-448-08929-7 |
| Library of Congress Catalog Card Number | 68-24655 |
| Series Number | 29 |
| Other | 8929 |
| Notes | Blue Cover, Library Book |
Added by jlkrien · Last edited by Anaideia