One of the best US guidebooks ever written, to a very diverse, complicated, and massively underappreciated region. The first edition was in 2008. This latest edition is in two 500+ page volumes because of the huge growth in routes. Well organized, beautiful color photos and topos, and the precision of a five-star quality rating system. A complete index as well as a list of climbs by grade, with separate listings for the +'s and -'s, a, b, c, and d's, organized within each grade by decreasing quality ratings.