Answer:
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I've told you all, I cannot tell you more. What am I?
I cover what's real; hide what is true, but sometimes bring out the courage in you. What am I?
People make me, save me, change me, and raise me. What am I?
If two is company and three is a crowd, what is four and five?
You can see it everyday, but cannot touch it at will. What is it?
What gets bigger the more you take away?