The Other (The Outsiders Sequence) by Annie Neugebauer

“Very effective... a nearly perfect, claustrophobic novella.” —The Wall Street Journal on the first book in the series, The Extra

It's not a sequel. It's next in the sequence...

A couple on an outdoor retreat meet their doppelgangers on a hiking trail and are soon tested on how well they truly know each other.

The Other is the second book in the Outsiders Sequence series. This edition features a special preview of The Spare, the third and final book in the Outsiders Sequence.