In the Hugo Award nominee Forty, Counting Down, computer genius Justin Kloster travels to the past to stop himself from making a terrible mistake. But all actions have their consequences. Then, in Twenty-One, Counting Up, Kloster's college life and romantic dreams are rudely interrupted when the 40-year-old Justin arrives from the future to save him from himself.

In April 1864, the Union garrison at Fort Pillow was composed of almost 600 troops, about half of them black. The Confederacy, incensed by what it saw as a crime against nature, sent its fiercest cavalry commander, Nathan Bedford Forrest, to attack the fort with about 1,500 men. The Confederates overran the fort and drove the Federals into a deadly crossfire. Only 62 of the colored Union troops survived the fight unwounded.

What if mankind's "missing link", the apelike Homo erectus, had survived to dominate a North American continent where woolly mammoths and saber-toothed tigers still prowled while the more advanced Homo sapiens built their civilizations elsewhere? Now imagine that the Europeans arriving in the New World had chanced on these primitive creatures and seized the opportunity to establish a hierarchy in which the sapiens were masters and the "sims" were their slaves.

On December 7, 1941, the Japanese launched an attack against U.S. naval forces stationed in Pearl Harbor, Hawaii. But what if the Japanese followed up their air assault with an invasion and occupation of Hawaii? This is the question explored by Harry Turtledove in Days of Infamy, with frightening implications.

The New York Times best-selling master of alternate history delivers the captivating first novel in his new World War II series. Harry Turtledove imagines how the war in Europe would have ended had British prime minister Chamberlain refused to allow Hitler's annexation of the Sudetenland.