American author Mark Twain attempted to write a book titled The
Mysterious Stranger. He worked on it sporadically between 1897 and 1908.
Each of the stories that Mark Twain authored features a paranormal
figure known as "Satan" or "No. 44." The versions were all still
unfinished (with the debatable exception of the last one, No. 44, the
Mysterious Stranger). The Chronicle of Young Satan is around 55,000
words long, Schoolhouse Hill is 15,300 words long, and No. 44, the
Mysterious Stranger is 65,000 words long. Mark Twain's Mysterious
Stranger Manuscripts, edited by William M. Gibson, was first published
in 1969 by the University of California Press as part of The Mark Twain
Papers Series. It was later reissued in 2005. A popular edition of No.
44, The Mysterious Stranger, was also published by the University of
California Press in 1982. The Phantom Stranger from DC Comics and the
Mysterious Stranger share a lot of similarities. Both individuals have
hazy backstories that leave room for the theory that they are exiled
angels.