"A Climber's Guide To Joshua Tree National Monument" by John Wolfe is the very first rock climbing guidebook that was written for Joshua Tree and was originally printed in 1970. John Wolfe and his group, The Desert Rats Uninhibited, put up most of the trade routes around Hidden Valley Campground that, to this day, remain the most popular routes in the park. When this book came out there were under a hundred routes in The Monument and today there are over eight thousand. This is where Joshua Tree rock climbing began and these are the guys who started it. This book is a time capsule of that era and gives deep insights into the culture of climbing way back in the early 70's. A Climbers Guide To Joshua Tree National Monument, December 1976, First Printing of 2nd Edition Published by A Desert Rats Unihibited Orange leatherette cover. Packet in back of book with original map enclosed. Heavily illustrated guide to rockclimbing in this area of the Southern California desert. Great video on it here: https://www.reddit.com/r/climbing/comments/fcnx82/the_first_guidebook_for_joshua_tree_national/