The Immortal Remains by Lee Hauser

The world’s ending in a month, but this isn’t the story of a scrappy heroine saving humanity.

Instead, Sam Wen is determined to check out early. But she can’t just die whenever she wants to, she can’t escape, and ending up the sole survivor on a planet of decaying corpses is not ideal. So you’d think that when her clone and an ex-lover show up to rescue her, she’d be eager to go along.

But you’d be wrong.

Set three hundred years from tomorrow, in a world where a space elevator springs from equatorial Africa, orbital colonies ring the earth, and a spaceship powered by atom bombs is poised to launch from the Canadian wilderness, _The Immortal Remains_ is a story of loss, escape, and a new kind of family.