I pretty much read everything in a book be it prologue, epilogue or very long and boring introduction.
However, this doesn't mean I like them. These devices strike me as tools used by authors who want to escape the way in which they tell the main bulk of their narrative. The best example I can give is Bob. Bob is a writer and Bob wants to write a crime story in third person about a investigator type catching a psychopath. He uses a prologue to introduce these happenings and in that prologue he deviates entirely from the rest of the narratives structure by writing in first person and yes, you guessed it, as the psychopath.
I just feel a bit blah when I see that. I have much more respect and willingness to read a book where the author builds all that suspense up him or herself. It just makes me feel like the mood is being forced upon me somewhat. Each genre might do it a little differently, but the result is the same.
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