On the Edge of Gone by Corinne Duyvis

Synopsis:

January 29, 2035. That’s the day the comet is scheduled to hit—the big one. Denise and her mother and sister, Iris, have been assigned to a temporary shelter outside their hometown of Amsterdam to wait out the blast, but Iris is nowhere to be found, and at the rate Denise’s drug-addicted mother is going, they’ll never reach the shelter in time. A last-minute meeting leads them to something better than a temporary shelter—a generation ship, scheduled to leave Earth behind to colonize new worlds after the comet hits. But everyone on the ship has been chosen because of their usefulness. Denise is autistic and fears that she’ll never be allowed to stay. Can she obtain a spot before the ship takes flight? What about her mother and sister? When the future of the human race is at stake, whose lives matter most?

This book was interesting. It's a little different than I've ever read before. While it's a post apocalyptic in the sense of "the end of the world" is coming via the comet, there are still ways to survive on earth. Basically, generation ships were created to take people away from earth after disaster hit. These ships would transport people to two new planets far away where they could reestablish a bigger population on a safer planet. Meanwhile, on earth, tragedy after tragedy happens. First the comet, then earthquakes, tidal waves and tsunamis.
The most interesting part of this whole book is the fact that the main character, Denise, is autistic. I personally don't have alot of experience with autism, but if her symptoms and struggles are realistic, it was a good insight as to what she dealt with on an everyday basis and how she coped in her own way to create a sense of "normalcy". 
On top of it all (as if doomsday wasn't enough to contend with) Denise's sister Iris is missing and Denise is left to deal with a mother whose drug addictions threaten to end all sense of safety.

It's a good book. It has some questionable morals in it, but a good read.

I'd give it 6 out of 10.