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 in the Plain of 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 selfexplanatory title of The Walls of Atlantis(b).
(a) ttp://www.atlantismaps.com/chapter_7.html
(b) http://www.grahamhancock.com/forum/FisherD3.php?p=1

