I'm not a fan of 'alternate history' novels, because they often seem to me written by people who would rather that history went a different way, and write so as to show that if it did, things would be dramatically different, and frequently better. Though not always; Harry Turtledove seems to have made a career out of showing how it could have been a lot worse.
Nevertheless, I'm enjoying The Peshawar Lancers. It's believable. Not so different as to be alien.... not so familiar as to be predictable. Good stuff.