It is the code book for best practice construction. It covers absolutely all phases of building construction, homes and commercial structures. Site selection, fill to be used, concrete specs for certain loads, as well as electrical installations etc. It is on the web and is offered in three sets. It must be mainly an english continent building guide, I don't know what they use here in the states but the currency requested is for pounds. Hope this helps, after scanning the information I don't see how you could go wrong using this information for any construction project. I learned something myself answering this question, thanks.