This is the book of books on indigo color and dye. I used this book as a reference for writing a short paper about indigo for one of my classes this semester and was amazed by the history, the different indigo plants, the origins of the word, the wonderful examples of textiles dyed with indigo and art made with the color; there is even a section on woad. The author really put forward the time and effort to research and write this book and it is simply amazing.