On the Edge of Gone - Corinne Duyvis

Halfway through this book, and it's amazing so far. It's more speculative fiction than sci-fi, and it's not so much about the apocalypse—a comet's about to crash into Earth—but about what happens after. A bit dark, but not grim, and written from the perspective of an autistic teenager determined to find her sister. 

 

Since I'm enjoying it so much, it'd be remiss not to point out that the ebook is still on sale worldwide for $1,29, or 0,96 € if that's your currency of choice.