Bud Not Buddy is a story about a boy named Bud Caldwell, an orphan growing up during the Great Depression. After running away from his new foster parents after a fight with their son, Bud travels from place to place until deciding to travel to Grand Rapids to find Herman Calloway, a jazz musician he believes to be his father. Hitching a ride with Lefty Lewis, he arrives and meets the band, who eventually realize Bud is actually Herman's lost grandson.
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.
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.