Answer:
found at the back of the book.
I am rubber you can eat!
I am put on the table, cut, but never eaten. What am I?
Roast, boast, coast, post. What do you put in a toaster?
2 in a corner 1 in a room 0 in a house but 1 in a shelter.
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.