Science fiction book covers, a history

io9 has posted a very interesting feature showcasing the evolution of science fiction book covers throughout the years, ranging from George Orwell's 1984 to Ray Bradbury's Fahrenheit 451.

You should check it out. Personally, I really like the covers of Signet Classic's most recent edition of 1984, as well as the 50th anniversary edition of Fahrenheit 451 (both of which I have owned for a while). They're very simple, but very effective.