Been reading some of those Cory Doctorow YA novels

There is very little YA science fiction that's not dystopian, and there's extremely little that's in any way hard or based on rigorous extrapolation. There's no real good reason for that; it's just that YA fiction exists in its own little world, and it tends to be really trend-driven and, so far, no one's published a hard sci-fi YA that's really blown u…