Now I'm picturing Clifford the dog in City and cackling.
I haven't tried Time and Again yet. I really liked City, but I just couldn't get into A Choice of Gods even though it has robot monks (robot monks!). I really think I like his short stories the best -- ever checked out "A Death in the Family"?
I can't remember the name of it either, but I know what you're talking about.
Yana and Iaroslav and Bekir are underweight during the first winter (thanks to winter coats, I have to show it in their faces more than their bodies) and Iaroslav loses muscle mass (it's the most visible on him, since he's kinda stocky).
Yana's weight fluctuates some in flashbacks -- she's a skinny thirteen-year-old, a kinda chunky fifteen-year-old, and is a little more pear-shaped at seventeen. Then she winds up underweight because civil war/failed state, and "currently" looks healthy in a slightly wiry way, thanks to enough food (finally!) and intense activity.
Yeah, I know, mine is black and white, but I like color-coding speech bubbles for languages. Like, in my guest strip for Cryptidia English has pale blue speech bubbles (because why not) and German has pale gold (the reasoning being that it's the only color on the flag that doesn't turn into another color when lightened, e.g. pink and grey.)