California National Forests (National Forests of America Series) by Andrew Horan Paperback, 128 Pages, Published 1990 by Falcon Pr Pub Co ISBN-13: 978-0-937959-59-6, ISBN: 0-937959-59-6
Front Range Bouldering by Bob Horan Paperback, 175 Pages, Published 1989 by Chockstone Pr ISBN-13: 978-0-934641-21-0, ISBN: 0-934641-21-8