You might also look at Phillip Roth's The Plot Against America, in which Charles Lindbergh wins the presidency in 1940. Or Fatherland, by Robert Harris.
Yeah, both good, in fact Roth's is excellent, largely because, like Macleod's work, it is significantly concerned with the normality of life in this alternative world. Of course, there's also Philip K. Dick's
The Man in the High Castle, which is significantly weirder than either. In that tradition of more slippery alternatives dealing with more recent history (the present, even), I can recommend Christopher Priest's
The Separation, based around WW2, but in which you aren't quite sure which version of reality is supposed to be the 'real' one, Kathleen Ann Goonan's
In War Times, which explores themes around how things could be better and plays with multiple points at which the Twentieth Century could have been different, again mainly centred around WW2, neither of which are that concerned with establishing a 'realistic' method by which change actually occurs, and Lavie Tidhar's
Osama and Matt Ruff's
Mirage, both of which are set in worlds where the War on Terror is a significantly different thing... For a much deeper and more complex alternative, you can't beat Kim Stanley Robinson's
The Years of Rice and Salt, which details a whole different history based on almost the entire European population being killed off by the Black Death rather than just 1/3... it also has a rather unique structure and way of dealing with the need for human interest on which to hang this story, using a traditional and very much non-western Buddhist framework to reincarnate a set of archetypical, but somehow also always individual and engaging characters throughout the novel. Might sound odd but it works rather beautifully. For my money, it is one of the best novels written in the 2000s in any genre.
