Answer:
A building where people and stories are on stage
It cannot be seen, it weighs nothing, but when put into a barrel, it makes it lighter.
Its title means book.
What is often returned but is never borrowed?
I am always hungry, I must always be fed. The finger I lick will soon turn red.
I am rarely touched but often held. If you are smart you'll use me well. What am I?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?