Whew! Too long! Since I stopped on page 9, forgive me if this was brought before:
This thing all things devours:
Birds, beasts, trees, flowers;
Gnaws iron, bites steel;
Grinds hard stones to meal;
Slays king, ruins town
And beats high mountain down.
-- Gollum's riddle from Tolkien's The Hobbit
take your time to figure that out...