The story is good, and the action rises at a very nice, steady pace. The conflict of the story heats up, and the main character is forced to start breaking the rules he has known his entire life.
Just when you think the introduction to the story is over and you are now reading the "rising action" phase of the story.... it ends... just like that, it ends. The author spends a hundred pages introducing us to the main character and the society he lives in, and about ten or less pages of his love interest.
Has this ever happened to you? Your reading, or watching a story unfold, and just when it seems like it's time for the ball to really get rolling and the plot to start thickening, it just suddenly ends? If so, what story/movie/show/whatever was it that did this to you, and how did you feel afterwards?
For me, I was surprised I guess. I didn't realize that 75% of the book was made up of rough drafts. I was starting to get into the story and really enjoy the direction it was taking, and than, bam... it ended.