You did everything to write a masterpiece and somehow it doesn't sell at
all. Even after the huge marketing campaign you only sold a few of them. The
reasons for that could be really simple to avoid. It doesn't need to be that
the story sucks or that it is full of grammatical errors. Most of the time it
is the fault of either the cover, or the blurb doesn't catch the interests of
potential readers.
Don't judge a book by its cover may be true, but so
is: I don't give books a chance which can't catch my interest.
