You can devide the craft of bookbinding in regular work and the applied art form.
The applied art form of bookbinding will give the binder the challenge to make a unique design, binding and decoration to make something special.
The experiment is a important part of this way of working.
You can make special binding for a competition, which are organised all over the world to promote this art form of bookbinding.
Or you have a commission by a collector or booklover who wants to have a special binding and design for a special book.