Tudor Jenks 
The Century World’s Fair Book for Boys and Girls / Being the Adventures of Harry and Philip with Their Tutor, / Mr. Douglass, at the World’s Columbian Exposition [PDF ebook] 
(Illustrated Edition)

Being the Adventures of Harry and Philip with Their Tutor,
Mr. Douglass, at the World's Columbian Exposition
Written in 1894, right after the closing of the 1893 Columbian Exposition, this is a interesting look at the World's Fair through the eyes of 2 young cousins who travel to Chicago from New York attended by their tutor.