The Captive by Fiona King Foster

In a cabin far away from civilization lives a woman, her husband and their two girls. Brooke has always kept her past a complete secret but when a fugitive winds up in their shed with a price on his head, she has no choice but to gather up her family and walk their captive to the sheriff miles away.
This is a surreal environment that feels like the wild west because Brooke and her family live in an area that has seceded from the U.S. leaving them without any modern convenience or real police.
The weather conditions, mistrust and being on foot with a dangerous man who has the power to take away everything important in her life makes her hardened and fiercely protective of her family. You don't necessarily like her or understand her motives until her upbringing is explained. This is the "Hatfields vs. McCoys" scenario but in a primitive remote setting filled with danger at every turn.
Readers who enjoy books with a light apocalyptic touch with strong characters who may have a checkered past will enjoy this.  4 stars