Hugh Howey's Wool is something of a cause celebre among self-publishing enthusiasts. It's garnered numbers of reviews and sales that many traditional-path authors would love.
The novel was originally published in 5 installments, and the first three stand pretty well as independent short stories. I also felt that these three stories are stronger than the last two much longer stories, because they felt fresher. I think the turning point for me is the end of the third story, the last line of which is the worst kind of action-movie cliche.
Not that stories 4 & 5 are bad, but they're somewhat predictable, compared to the first 3.