Answer to Teacher with spines & Hinges Riddle

Answer to the Puzzle of the Day 2185 : Teacher with spines & Hinges Riddle
Here is the refresher to the puzzle

Riddle : I have no voice but I can teach you all there is to know.
I have spines & hinges but I am not a door.
Once I’ve told you all, I cannot tell you more.

What am I?

Here is the Answer : 

Answer : Book
Explanation :
It doesn’t have a voice but teaches. It is bound at the spine with hinges to provide good hold for the pages. It cannot teach you more than its there in the book. Effectively you cannot learn more than what it says.

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