Answer:
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard.
Its title means book.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
One by one we fall from heaven down into the depths of past, And our world is ever upturned so that yet some time we’ll last.
What is so fragile that saying its name breaks it?
What language does a billboard speak?