Legs tells the story of the title character, Jack "Legs" Diamond, through the lens of his ethically ambiguous lawyer Marcus Gormen. The novel explores Jack's criminal history, his various escapades as a Mafioso, and ultimately his humanity and his redeeming traits. It paints a frank picture of crime and criminality in the New York City of the 1920s and 1930s. Gormen's questions to Jack as they prepare for his defense form the framing narrative.
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.