Excellent book if you want to build dry stone walls in your area. Easy to follow, sensible practical instructions which match the real world with an awareness of regional differences in available materials. Building walls of natural stone in your area would not, for instance, work if you were following advice from a one-size-fits-all manual. Round boulders, for example, have a different technique to flat square type stone. A really useful manual written by people who have obviously acquired their skills through practical hands-on experience.