But some books out there are so scarce, that their monetary value is simply eye-watering. Browse the gallery and read up on some of the most valuable rare books in existence. You may also like ...

These are the most valuable comic books in the world. Value: $104,563 "More Fun Comics" No. 73 features the origin and first appearance of Aquaman, which has become one of DC's most-loved superheroes.

The new library which in now being constructed between Widener and the Union will shelter the University's "most irreplaceable and valuable manuscripts and printed books," according to William A.