Doug Fisher is the author of a forthcoming book The Atlantis Maps: The Rise of Atlantis and the Fall of a Paradigm in which he places Atlantis on the Plain of the other Mesopotamia in Argentina. The book is still a work-in-progress, but four chapters are sometimes available online(a).
Fisher has published an illustrated paper on Graham Hancock’s website with the self-explanatory title of The Walls of Atlantis(b). His suggestion of a huge outer wall encircling the city of Atlantis has been disputed by Jim Allen, provoking further comments(c) from Fisher.
He has also criticised the methodology, which Allen used to place Atlantis on the Altiplano(d).
(c) http://www.abovetopsecret.com/forum/thread646457/pg2 (half way down page)