Rand, McNally & Co.'s A Week at the Fair (1893)
Archive.org direct link
Open Library main page
An extensive guidebook to the 1893 World's Columbian Exposition (also called the World's Fair) in Chicago. Lots of detail about the exhibits, structures, creators, performers, countries and so forth that were involved. The ads at beginning and end are today almost as interesting. This is the same fair that was background to one of the stories in Chris Ware's Jimmy Corrigan.