SparkNotes has summaries of many novels, poems, short stories, and plays. It is a useful website that you may wish to refer students to. I tell my students about SparkNotes generally the day before we test on our outside reading project. This allows those who read the novel to enhance their understanding.
The notes are accurate but are sometimes full of spelling mistakes and grammatical errors. It is common to see typos as well. They do, however, provide students with the plot.
Each work contains a character list, a summary of the plot, analysis of the summary, analysis of common themes as well as questions that can be used for discussion or essays.
Apart from English study guides, SparkNotes also contains notes on chemistry, physics, biology, math, and philosophy.