Jessie's Last Signal - House of Light, #3

Jessie, a veteran with PTSD and an alcohol abuse problem, fends for himself in a post-collapse Alabama fraught with poverty and corruption. As he struggles to sustain himself in an abandoned railroad signal station, he learns of a group of orphaned kids living in the forest nearby. Despite his wish to remain isolated, he finds himself caring about them, acting as their silent protector. He fends off a biker gang and a group of untrustworthy guards using his skills as an Army electrician.
The kids do their part to watch out for him too. But when it comes to fighting the elements, they must decide to trust each other or face death alone.