Back in 1999, a site called The Spark that aimed to help its users better understand literature hit the internet. Shortly after, a series of six literature study guides were published to the site, simply called SparkNotes.
Fast-forward to today, and SparkNotes is alive and well; in fact, it's now on Android. The app offers the same idea behind the original site: to help literary content make sense to students. It features 50 pre-installed study guides and hundreds more available for online viewing/downloading, along with a check-in feature so you can easily find other users in the same location and start a study group, and the ability to share what you're currently studying with your Facebook friends.