Summer of My German Soldier is a YA novel that takes place in Arkansas during WWII. It tells the story of Patty Bergen, a twelve-year-old girl with a violent home life who ends up hiding an escaped German POW, Anton. During the summer she houses him, Patty and Anton become close, Anton teaching Patty that she is a person of value, something she has never been able to believe because of her father's abuse. This touching coming-of-age novel explores theme of prejudice, self-esteem, and racism.
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.
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.