Book of (more or less) useless information
Maria picked up at the public library a wonderful book for me: Schott's Original Miscellany. It's a slim, hardcover collection of interesting and eclectic trifles and it even has a website. Originally, I thought that it lacks an index; not true, I just mistook it for an uninteresting collection of statistics. It does lack a list of sources. It isn't quite useless but it is a very entertaining diversion. That might be the point.