An American Tragedy is the story of Clyde Griffiths, a young man raised by penniless religious fanatics. Clyde falls into a life of crime, flees his hometown, and becomes a foreman in the factory of his wealthy uncle. His uncle, though, does not permit him access to rarified social circles. Isolated and forbidden from interacting with the workers, Clyde begins clandestine romances with a poor worker and with a bored socialite. Eventually he murders the pregnant worker in an attempt to join high society, but he is caught and executed.
Boasting the largest collection of book summaries, BookRags is the best option for titles you can't find elsewhere. They offer all of the basics (quotes, chapter summary, characters, historical context, literary criticism) but also walk through a few major topics that recur throughout the book, which can be particularly useful for essay writing.
The original provider of professionally-written study guides, Cliffs Notes were available in print form before the Internet even existed. Their content is very comprehensive and includes an analysis of characters, detailed chapter by chapter summaries, critical essays, essay topics, and many other sections.
Their book summaries aren't as good as other providers, but PinkMonkey often has interesting insights that aren't mentioned elsewhere on the Internet. For example, they go over literary elements (like setting, conflict, and mood), compare and contrast, and symbolism/motifs. It's a good site if you want to find a unique fact or angle that other students don't know about.
Includes the standard sections found in most book notes, including a book synopsis, chapter by chapter analysis, author biography, character list, essay topics, book report ideas, and study questions. This website is less comprehensive than other book notes sites, but could be useful if you're looking for a quick review.