Hardcover
(Random House Books for Young Readers, Sept. 12, 1968)
HC, 1968, ex library, cover shows wear and rubbing along edges, corners, and spine, tape reinforces the hinges inside both front and back cover, smudges on fore edge, clean inside, tight binding.
Paperback
(Random House Books for Young Readers, May 12, 1978)
While vacationing on a California ranch, three boys decide to investigate strange wails that come from a mysterious cave where a famous outlaw disappeared.
While vacationing on a California ranch, three boys decide to investigate strange wails that come from a mysterious cave where a famous outlaw disappeared.
While vacationing on a California ranch, three boys decide to investigate strange wails that come from a mysterious cave where a famous outlaw disappeared.