This book is intended as an index helper for handspinners who want to keep track of their own handspinning outcome.
By filling in the blanks, the spinner now has a written form of their own work progress and can easily go back and forth to compare previous projects and thus have a personal development progress journal or simply just being able to go back to yarn projects that has been successful, in case of wanting to spin a similar yarn either for them selves or for others (commercial).
By attaching yarn samples and writing down individual dye recipes it's easy to either go back to a successful dyeing result or try to develope a recipe further.