Captain Nemo: The Fantastic History of a Dark Genius is a novel by Kevin J. Anderson, published in 2002 by Pocket Books. It is a secret history and crossover work, the central premise being that many of the things Jules Verne wrote about existed in real life as told to him by the real Captain Nemo. In 2015, Anderson wrote a short story sequel, "20,000 Years Under the Sea," which incorporates elements from H. P. Lovecraft's "The Call of Cthulhu" and At the Mountains of Madness. Source: Wikipedia (en)