After the Fall, Before the Fall, During the Fall by Nancy Kress

This slim book is the story of how the world ends and what comes after.  Three stories intertwine to give the whole story.  The child abductions and store robberies that can be predicted by fancy algorithms but to which the purpose and the method is unknown.  The bacterial mutations and tectonic rumblings happening all over the world.  The survivors within the shell; an egg-shaped habitat created by the Tesslies that may be the last ditch attempt to save humanity.

If you want a quick read that makes you think you may enjoy this story.  Be forewarned, while this book asks a lot of questions it provides very little in the way of answers.