The Grand Canyon of the Colorado River is one of the greatest natural attractions on earth for a rockhound. I have a long list of books about the Grand Canyon. Some of these I've accumulated over time; others I bought specifically during my 1999 trip to the Grand Canyon.
AN INTRODUCTION TO GRAND CANYON GEOLOGY
Price, L. Greer
c.1999, Grand Canyon Assoc.
A simple tourist's guide to the geology of the Grand Canyon and the Colorado Plateau.
CORRIDORS OF TIME*
c.1980, Times Books
A comprehensive look at the geology and geography of the Grand Canyon, with many high-quality photographs, diagrams, and cross-sections.
THE EXPLORATION OF THE COLORADO RIVER AND ITS CANYONS
Powell, John Wesley
c.1961, Dover Books
A facsimile reprint of John Wesley Powell's journal of his trip down the Colorado River through its series of canyons, including Glen Canyon and the Grand Canyon.
GRAND CANYON COUNTRY
c.1997, National Geographic Society
GRAND CANYON GEOLOGY
Beus and Morales
c.1990, Oxford Univ. Press
Collection of journal-quality articles on the stratigraphy of the Grand Canyon.
THE GRAND CANYON
c.1972, Time-Life Books
GRAND CANYON: THE GREAT ABYSS*
c.1995, HarperCollins West
THE MAN WHO WALKED THROUGH TIME
c.1967, Vintage Books
Colin Fletcher's account of his walking-trip through the Grand Canyon from end to end.
PAGES OF STONE: Grand Canyon and the Plateau Country
c.1988, The Mountaineers
VOLCANOES OF NORTHERN ARIZONA
c.1997, Grand Canyon Assoc.
A simple, easy tourist guide to the volcanoes of the San Francisco Volcanic Field in north-central Arizona, south of Grand Canyon.
A WILDERNESS CALLED GRAND CANYON
c.1991, Voyageur Press