W. D. Gann’s 1927 novel, The Tunnel Thru the Air; Or, Looking Back from 1940 , is a unique blend of science fiction, romance, and coded financial wisdom. While framed as a story about a future war, it is widely believed to contain Gann’s secret methods for predicting market cycles. The Core Plot

Set in the "future" (1930s), a massive world war breaks out. The United States is attacked by a coalition of European and Asiatic powers.

Robert uses his inventions and understanding of cycles to lead the U.S. to victory, eventually reuniting with Marie. Key Themes and Hidden Meanings