I've just uploaded an article to BioFortean Review:
A Mammoth Hoax by Chad Arment
[Reprints the Cheriton Blatchmatchnik Siberian mammoths sighting, from 1873, which was a hoax by the New York World.]
Two books are now available from Amazon (and should appear on Barnes & Noble, Amazon UK, etc., shortly).
Mokele-Mbembe: Mystery Beast of the Congo Basin by Bill Gibbons
Bestiarium Cryptozoologicum: Mystery Animals and Unknown Species in Classic Science Fiction and Fantasy Chad Arment, editor