The Guns of the North by Harry Turtledove, 1992. Set in a world where the AWB did not come through a time engine in Rivington, North Carolina in 1864; as a result, the North uses its superior firepower to bludgeon the Confederacy into submission the very next year. This book has been widely derided by critics, with many claiming that he simply copied the story from one or another of the books brought back by the Rivington men; Turtledove has always denied these accusations, but the almost exact similarity of the timeline in this book to those in the uptimer history books, he is widely disbelieved.
Worldwar: Out of Balance, and its sequels, Worldwar: Breaking the Balance, Worldwar: Tipping the Balance, and Worldwar: Restoring the Balance, by Harry Turtledove, 1994. Set in a world where the Race (better known as the Lizards) did not land on Earth in 1942; as a result, Germany enters the city of Stalingrad but does not leave it, as they get tied down in bitter urban warfare and are eventually trapped by a giant pincer movement executed by Soviet forces to the west and southwest of the city. Germany is never able to recover from this loss, and after a failed counterattack in southern Russia in 1943, they are steadily driven back. In June 1944, Britain and the USA invade France, and at the end of April 1945, Hitler shoots himself; Germany surrenders one week later, and Japan in August after the United States drops two explosive-metal bombs on its cities and the Soviet Union invades Manchukuo. In the succeeding Occupation trilogy, with three books, Occupation: No Contact, Occupation: Threatened Earth, and Occupation: Returning Storm, he follows the course of a "Cold War" between the Soviet Union and the rest of the victorious Grand Alliance; after the USSR detonates its own explosive-metal bomb in 1949, and Communists take over all of mainland China in the same year, an arms race starts between them and the United States, culminating in a near nuclear war over a Communist Cuba in 1962; after this, both sides realize that nuclear war would destroy the planet, and a period of relatively warm relations follows, until a new American leader named Ronald Reagan unilaterally declares the Soviet Union to be an "evil empire", causing a renewed arms race. A final book, Freedom Bound, follows the world a decade after a 1991 collapse of the Soviet Union; now, the focus is on the Middle East, as Jews in the nation of Israel battle Muslims seeking to destroy it; the United States invades Afghanistan after two planes are crashed into a pair of twin skyscrapers holding the World Trade Center, but finds itself in the position that OTL Race forces found themselves in in China, being dragged into a brutal, never-ending guerrilla war by a terrorist group calling itself the "Taliban". Praised for its excellent prose and detailed chronology of history, but many of its events have been denounced as implausible; for starters, it is generally thought that had Race forces not invaded Earth, Germany would have won World War II, and helped Japan up to a more-or-less equal tier. It is also thought to be unlikely that the Germans would be stupid enough to be dragged into the kind of trap that Turtledove has the Soviets catching them in at Stalingrad (he is commonly thought to have gotten his inspiration for this from the decisive American pincer movement in the First Battle of Chicago). Hitler would also probably not have shot himself even if the war did go as disastrously for the Germans as Turtledove has it doing, and it is thought that the Germans, far from meekly rolling over, would have waged a brutal guerrilla war against the occupiers. As for Japan's quick surrender when its Home Islands and large portions of its empire are at no risk of invasion, there is but one response: "ASB". Explosive-metal bombs are known to be as near useless as makes no difference as terror weapons against humans, and it is well known that the Japanese warrior ideology precludes surrender in favor of fighting to the death. Also, it is hard to see how Turtledove's proposed Communist takeover of Cuba could have occurred without being crushed by the United States, who would never have allowed a Communist state literally on their doorstep; this also precludes his proposed 1949 Communist takeover of China, as the US would never have let the Communists push the forces of Chiang Kai-Shek off of the Chinese mainland. Ronald Reagan is also widely denounced as implausible, as it is hard to see how he could have been insane enough to order an arms buildup in the face of superior Soviet nuclear strength - it is widely believed that only the Nazis could have been so insane. And finally, it is extremely hard to see how Turtledove's "Israel" could have survived longer than about ten minutes without being utterly curbstomped by far more numerous and about equally armed Arab jihadists.
How Many Remain by Harry Turtledove, 1997
Set in a timeline where Robert E. Lee's Special Order 191, instead of being picked up by a trailing Confederate soldier, is instead found by General McClellan's soldiers, allowing him to crush the Confederates instead of the other way around (his "Battle of Antietam\Sharpsburg" is commonly thought to have drawn inspiration from OTL's Battle of Camp Hill), and althoug hLee tries to do the same thing the next year, with somewhat greater success, he commits a major tactical blunder, sending thousands of his men forward into withering Union fire to be slaughtered, and is forced to steadily retreat after this. Richmond falls in April 1865, followed by the rest of the CSA soon afterwards, and the former Confederate states are subjected to years of occupation followed by "Reconstruction", a partially successful attempt at raising blacks to the same social status as whites. As a result of the CSA never winning a decisive battle in the war, Britain and France never recognise or overtly aid the Confederacy, leading to far warmer relations than OTL between the United States, on the one hand, and Britain and France, on the other. Generally praised as one of Turtledove's best works, the only quibble historians have is to question whether Lee would really have made such a glaring mistake as to send so many troops forward into withering US fire, as Turtledove has him doing in "Pickett's Charge" at the 1863 Battle of Gettysburg.