Is Pseudonymous Bosch really Jon Scieszka?
It is unknown who he is. Some names people believe he is:
Lemony Snicket (Daniel Handler)
Edie Bilmann
Jon Scieszka Raphael Simon
Morgan McDonald
Some believe he's actually a she.
Others hypothesize that a highly intelligent chimpanzee is
responsible.
Others, noting that even a brilliant chimpanzee would be
incapable of prose, have posited instead that the highly
intelligent chimpanzee hired a roomful of chimpanzees with word
processing skills, and that those employees, in turn, alternate
between producing the complete works of Shakespeare (completely
useless to humanity at this point, since they've already been
written) and the oeuvre of Pseudonymous Bosch.
We don't know.