The world's longest novel is a 15,145 page work by a custodian from Chicago.

Henry Joseph Darger Jr. was a reclusive American writer and artist. Like is common among writers and artists, he struggled economically. He worked as a custodian in Chicago during the early and mid 1900s. His work was discovered by his landlords shortly before his death. Nathan Lerner, who was a prominent culture figure in Chicago, immediately recognized the value in Darger's work. 

When he passed, they took over his estate. His magnum opus is his novel called ‘In the Realms of the Unreal,’ which was 15,145 pages in length! The majority of the book is a section called "The Story of the Vivian Girls, in What is Known as the Realms of the Unreal, of the Glandeco-Angelinian War Storm Caused by the Child Slave Rebellion," which tells the story of 7 princesses fighting against a regime of child slavery. 

The novel also includes numerous illustrations that have been pretty popular in the years after. Darger's work has been considered a prime example of outsider art. There have been many references in popular culture to his work, including comics, songs and videogames. 

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