Hardy Boys #7 The Secret of the Caves Hardcover – Franklin W. Dixon – Vintage

Hardy Boys #7 The Secret of the Caves Hardcover – Franklin W. Dixon – Vintage Mystery Adventure Unravel seaside secrets with The Secret of the Caves (Hardy Boys #7) by Franklin W. Dixon. This beautifully illustrated hardcover edition from Grosset & Dunlap features Frank and Joe Hardy in another gripping adventure filled with suspense, strange sightings, and hidden tunnels. A collector’s favorite, this volume showcases classic cover art and a bold blue spine—perfect for vintage book displays or teen mystery fans. 📚 Aesthetic Highlights: Hardy Boys Mystery Series #7 Hardcover with vibrant 1960s-style cover art ISBN: 9780448089072 Pre-owned and in good condition Great for collectors or retro-themed reading nooks 📦 Ships fast and securely from a clean, smoke-free home.