This is my first year dying with plants, and I checked this book (along with several others) out of our local library over the winter so I could prepare for the short growing season. This is the only one I went out and purchased so I could have a copy on hand. I'm trying to focus on plants I have growing in my own yard, and Rita's book is extremely helpful when I'm trying to figure out what to do with an uncommon dyeplant - for instance, she has a page where she talks about dyeing with pokeberries, but extrapolates from that to give some general rules that should work for dyeing with almost all berries - helped me when I tried to dye using buckthorn berries, mulberries, and cherries. I've since bought several other dye books, but if I could only choose one to have on hand, it would be this one (or her companion book, A Dyer's Garden - but I loved the information on fiber plants that this book had).