In Harry Potter and the Goblet of Fire, Harry returns for his fourth year at Hogwarts to find that the school is hosting the Triwizard Tournament, a competition between three wizarding schools. When Harry is unexpectedly chosen as a competitor, he must not only face the tournament's dangerous tasks, but also uncover who submitted his name as a competitor - and why. Ushering in the return of Lord Voldemort, this installment is a major turning point for the series, and also touches on themes of friendship, slavery, and coming of age.
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 most popular website for book notes. SparkNotes was created by students for students, and their summaries are accessible and extremely well-written. Besides the usual plot overview, chapter summaries, and character analysis, SparkNotes differentiates itself with a section discussing themes, motifs, and symbols.