- Octavo, green cloth, in a dust wrapper. The dust jacket is lightly rubbed. 240 pages. Numerous black-and-white illustrations. There is an area of light staining along the inner edge of the rear cover, else very good.

First edition.

The author and his fellow adventurers make an expedition into some of the unexplored canyons of Baja California, using a helicopter and a "Pak-Jak", a special motorcycle designed for transportation in heavy sands and rough terrain.

AMERICANA; MEXICO; BAJA CALIFORNIA; EXPLORATION; CANYONS; HELICOPTER; MOTORCYCLE; PAK-JAK; ERLE STANLEY GARDNER; ILLUSTRATIONS; FIRST EDITION; 1ST EDITION.