The Redeemed by Matthew Cox
"Cox mixes fast-paced action and nuanced characters with a plausible future dystopia to create a tale that will appeal to fans of wasteland mayhem and future history alike.
This novel is the second in the Roadhouse Chronicles series. So, that dust cloud on the horizon is probably spoilers."
More thoughts here: https://davidjhiggins.wordpress.com/2018/02/02/the-redeemed-by-matthew-s-cox/