Desolation Crossing (Deathlands #87) by James Axler
Survival is a dangerous enterprise in the aftermath of a nuked America. Humanity perseveres, but the Deathlands code is far simpler: kill or be killed, live or die trying. Driven by the fires of hope, a resilient band of warriors traverse the new frontier of the future, survivors by skill and legends by reputation.
The legend of the trader returns in the simmering dust bowl of the Badlands, the past calling out to armorer J. B. Dix. Her name is Eula. Young, silent and lethal, she's part of a new trading convoy quick to invite Ryan Cawdor and his band on a journey across the hostile terrain. But high-tech hardware, fast wags, flowing jack and friendly words don't tell the real story behind a vendetta that is years in the making.