Gullible's Travels
What Jonathon Swift's "pygmies and giants" book should really be named, since you'd have to be outrageously naive to actually believe any of the crap that he relates.
If it would be possible to find someone who genuinely thought that the "Gullible's Travels" book was based on true events, you could likely also get him to swallow two additional "fanfic" chapters wherein the book's narrator also was able to assume ownership of the Brooklyn Bridge and establish a homestead in the Florida swamplands.