These are some of the images drawn by Henry Darger. Chris was right- the collection, the novel, was over 15,000 pages long. His opus was titled:
"The Story of the Vivian Girls, in What is known as the Realms of the Unreal, of the Glandeco-Angelinnian War Storm, Caused by the Child Slave Rebellion."
The first photo is actually of Darger's 1 bedroom apartment in Chicago. He died in the 70's and after his death (particularly in the 90's) became a well-known example of an "outsider" artist. I looked for photos of his writings- but couldn't seem to find any examples online. The writings juxtaposed with the imagery are where I think he is most similar to the description of Zampano. Interestingly, much of the discussion surrounding Darger has to do with his mental health status. He's described as "a poor, unkempt, ill-educated, half-mad man lost in the fog of his own loneliness." (http://www.pbs.org/pov/pov2005/intherealms/about.html) His story parallels both Johnny and Zampano in that he was a man who held menial jobs, had lived in and out of institutional settings as a child and obviously was obsessed with an entirely fabricated world. Tearing it down and rebuilding it over and over and over again.
There is a ton of information on Darger online. Very interesting figure.