Counting Up, Counting Down is a collection of short stories by Harry Turtledove, most of which were first published in various fiction magazines in the 1990s. It is named after two of the stories appearing in the book, one called "Forty, Counting Down" and the other named "Twenty-One, Counting Up", which are united by the character of Justin Kloster. The story genres represented include alternate history, time travel, fantasy, straight historical fiction, and more. Two story, "The Decoy Duck" and "The Seventh Chapter," are set in the Videssos Universe, with the former story being set before any of the other stories and books in that universe. The book was originally published by Del Rey as a trade paperback in January 2002. In the same month, it was brought out as a leatherbound limited ed