Top Girls is a play that examines the role of women in business and society. Marlene, the main character, has had to choose between having a child and having a career. She chose the latter, leaving her child with her sister. The play uses surrealism and experimentation to make a comment on feminism and the roles women can take on. The opening act features a dinner party hosted by Marlene, with a cast of historical figures. The final act is a flashback, showing a younger Marlene leaving her daughter behind.
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.
You won't get any frills with GradeSaver -- just the content you expect. Their study guides include a full plot summary, themes and character analysis, study questions, and the e-text of the book. One hidden gem is their collection of literature essays, but you'll have to pay for it.