Robert Conroy's 1901 and 1945 are my favorites.
Red Inferno is probably my third favorite, but after that his books are really hit-or-miss.
In the Presence of Mine Enemies and Ruled Britannia are solid stand alones by Turtledove.
If we start moving in more ASB territory, then the Clockwork Century Series by Cherie Priest is pretty good.
Heavy on the Steampunk/ASB side, given that Bigfoot and Zombies are real.
Red Inferno is probably my third favorite, but after that his books are really hit-or-miss.
In the Presence of Mine Enemies and Ruled Britannia are solid stand alones by Turtledove.
If we start moving in more ASB territory, then the Clockwork Century Series by Cherie Priest is pretty good.
Heavy on the Steampunk/ASB side, given that Bigfoot and Zombies are real.