This is the
Warning: Undefined array key "hb-054" in /home/public/cover.php on line 52
cover for The Mysterious Caravan.
- Series: Hardy Boys Canon (1-58), Volume: #54 (view list of titles in this series)
- Cover art by Nappi, 1975 (read about cover artists)
- Cover format 10
Image source: webmaster's personal collection