Answer:
how many words are in those books
Sometimes black, sometimes white, I have veins but no blood
What binds two people yet touches only one?
I always run but never walk, I sometimes sing but cannot talk, No head on which a hat to place, You always look me in the face.
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.
What covers its face with its hands, speaks no language, yet most known what it's saying?