Plain Living: A Quaker Path to Simplicity (2001)
Unlike the other collections I've mentioned, Plain Living: A Quaker Path to Simplicity, by Sorin Books, is more a collection of quotes for contemplation than an organized set of readers to explain what Quakerism is about.
Whitmire introduces each chapter with a few paragraphs for context, and then different sections of each chapter contain brief excerpts of prose and poetry. Chapters have titles like "Keeping to Plainness by Choosing" and "Growing Together in", with sections like "Community", "Decision-Making", and "Reconciliation and Forgiveness". It's easy to find a selection of quotes on a lot of different subjects, but browsing the book generally is also fun.