Much has been written about Frank Miller's Dark Knight Returns, however to describe it as "overrated" would be pure folly. This tale of hope and redemption may not be delivered in a familiar fashion, but its story hides a real heart which is has been rarely matched in the intervening years.
The story relies on a lack of subtlety which is aimed at key figures in popular culture and society (such as President Reagan), however this is no negative point and the way the book aims to place a morally dubious character (Batman) in a world characterised by murky dealings and violence is a brilliant aspect to the series.
The way in which the series is best viewed is the fact that it created a universe in which comic books and superheroes could deal with real problems to society, in a fashion which relied on intricate storylines mixed with art which was eye-catching and bold. Buy it and enjoy it.