The Voynich Manuscript/Leo Levitov
Levitov's claim of decipherment has been thoroughly discredited.
For a critique by linguistic science, by Jacques B.-M. Guy, see http://www.voynich.net/reeds/gillogly/levitov
For a critique by historical analysis, by Dennis J. Stallings, see http://web.archive.org/web/20010410030648/http://www.geocities.com/ctesibos/voynich/levitov2.htm