These books are an analogue to Arctander’s book about naturals, but longer since there’s more to deal with. He describes an enormous number of aroma chemicals and how they are used. These are in good condition. Volume three has a hardly visible crease on the cover; volume two has a crease on the corner on the bottom left, about 3/4-inch long. Volume one shows signs of wear on the back. If you would like photos of these defects, let me know and I’ll shoot some with my phone. Notice, also, that there is a brown/black smudge on all three volumes on the left where the yellow strip is. This appears in all volumes and in volumes I’ve seen for sale in other places. Apparently, it’s in the printing.