Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Mystery

Good Stuff:This was a well-thought out mystery with no holes in the plot that I could discern. It was an interesting story.The writing was excellent. Good, concise prose.Except for a small formatting issue of extra lines and lines breaking off to the next line at odd moments, there were no editing errors that are sometimes rampant in self-published works.The Bad Stuff:The characters weren't 'deep' enough. They all seemed to be described very superficially. While I cared about the story, the characters were just two dimensional.However, I know this is the first in a series, so perhaps the author plans on fleshing out the characters more in subsequent books.Overall:A fun mystery with a dash of police procedural.