I’m very tired, so I’m just going to note that Alexander Rooksmore’s BYZANTIUM EXPRESS imagines a world where Byzantium never fell, and WWI has just begun. Alternate history purists — and some mere enthusiasts — will likely quibble at how little a difference the survival of the Byzantines made to history*, but the story is engrossing enough that I did not mind. I liked it quite a bit, really. It had the feel of realness to it.
*A world without Lepanto or the Siege of Vienna would be… significantly different from our own, surely.