Few people have not heard of Atlantis. In fact it is the most enduring historical mystery since it was first recorded by Plato nearly 2,500 years ago. In 1882 it was brought to the attention of a wider audience when the Irish-American politician, Ignatius Donnelly published his book, Atlantis: The Antediluvian World and although flawed and dated, his book is still in print. Since then, hundreds of other books and articles have been written on the subject promoting a wide range of competing theories. Atlantipedia is the most comprehensive overview of all those theories and their proponents. It is an invaluable source book for both the general reader and the serious researcher.