Good Riddles

Question: how do cows count?

Question: in all of written history I won't show up at the end of a sentence but I will be there in the end . . .

Question: why did the cops raid the orchestra pit?

Question: There are two persons. One is dead and one is still breathing. The dead one is called dead person. What did the other person call?

Question: Which kind of book can move by itself?