Thomas Greanias (born February 19, 1965 in Wilmette, Illinois) is an American novelist. He is also the founder and CEO of the new media development, production and finance company Thomas Greanias Entertainment. Greanias graduated from New Trier High School in Winnetka, Illinois in 1983. Greanias graduated from Northwestern University in 1987 with a bachelors degree and a masters degree in journalism. While still in college, he began reporting from Washington, D.C. as an on-air correspondent for NBC television affiliates.
Greanias's first published novel was Raising Atlantis, it has been translated into more than a dozen languages. In April 2008, Simon & Schuster released a sequel, The Atlantis Prophecy. In August 2009 Greanias's third novel: The Atlantis Revelation was released.
In June 2009 a paperback titled The Atlantis Legacy was released. This was not a new work, but a bundling of the first two novels into a single book.