A.G. Riddle all books PDF/E-pub files are available on this site for download. A.G. Riddle wrote several thought-provoking books across various genres. Here are some of his notable works “The Long Winter, The Extinction Files, The Origin Mystery, and Standalone Novels". Albert Gallatin Riddle, born on May 28, 1816, was a U.S. Representative from Ohio. He originally hailed from Monson, Massachusetts, and later moved with his parents to Newbury, in the Western Reserve of Ohio in 1817.