The worst, I have to nominate Battlefield Earth. I was so entrenched by ads that I actually bought the book, than left it in my grandma's home with the hope she will donate it to some worthy organisation. What can I say. The science is mostly flawed( read his human biology, the astrophysics he assumes exist and also his geology ). The way he assumes history works is also flawed (he assumes the model template for history is liken to that of the founding of the USA. ). His assumption of human interaction is also flawed( people in panic do not behave the way he describes ). The only good thing in the story is the economic template he uses, but even so it only looks nice in theory. How can that book become a movie????