Trivia-on-Book: Mr. Penumbra's 24-Hour Bookstore: A Novel by Robin Sloan Take the challenge yourself and share it with friends and family for a time of fun! Mr. Penumbra's 24-Hour Bookstore encompasses history, books, and technology to show how the old and the new exist side by side today. It explores the age-old human quest for immortality-how close we are (or not) to achieving it and whether our immortality lies in what we leave behind rather than our physical presence. The book is a great