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.
I know a word of letters three. Add two and fewer there will be. What is the word?
I come off of a beautiful creature which soars in the sky. I come off of a peckish creature which has a tail as mighty as the sun! I am sometimes dirty and parents beg you not to pick me up.
I pass before the sun but make no shadow. What am I?
Part carbon part water I am poison to the fishes. Many falsely claim my name I am the pause that refreshes.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.