An coworker's loves Charles Dickens and reads all sorts of other books with "high literary content". Most science fiction doesn't qualify as great literature. Lots of shallow character development, generally simplistic moral conflicts, etc. Mostly we have good stories in interesting environments and mind twisting realities. As a prime example, Asimov is the master of the good story. Easy to read with decent characters and non-trivial values. But your English teacher wouldn't be impressed. Philip Dick can twist reality but his books hardly qualify as great literature. Gene Wolf gets a lot of high-literary-value scores, but I haven't read any of his stuff (which is strange because I consume so much science fiction). I'll be correcting that soon. So, if you like Dickens, comment on science fiction that moves you like Dickens does, if such a thing exists. If you don't like Dickens or haven't read any, please refrain.