Book excerpt: The new edition of Boston Rocks took over 80 volunteers and 4 years to complete, and includesinformation on more than 800 routes at more than 50 different areas. Some 50 new crags or boulders are described, including bouldering areas, small toprope cliffs, and a few larger cliffs that can be lead. The guide has a clean, new design, about half of the cliff illustrations are new and the rest have been updated, all of the maps are new and up-to-date, route descriptions have been added, as have photographs, GPS locations, and informational icons.