Time Was by Ian McDonald is the most exquisitely tender war/ time travel story I’ve ever encountered. If time travel has never been your thing, this is your gateway drug.
[Edit] Okay, I just have to say more about this book because I can’t stop thinking about it! In fact, it’s one of the very few where I got to the end and turned right around and started reading over again.
This has nothing to do with its length (short, yes, but with many worlds folded within). It’s because it fills me with such terrible longing that I’m compelled to go back and search for a cure, even though I know this will only sharpen that marvelous pain.
Again: Think you don’t like time travel stories?
I challenge you to not fall madly in love with this one.