DOWN THE ROAD: ON THE LAST DAY by Bowie Ibarra takes place in the same zombie apocalypse as the first book, but it's not exactly a sequel. While I recommend reading the original story before this one, it's not necessary. Readers of both will discover what happened to two of the characters who drive off from the original storyline.
My favorite part of the story is the moment the town's survivors hang their banner on the building to expose the media lies. I love how the townsfolk pull together to secure their town. Of course, the military nutjob has to go and wreck things. The UN forces learn the hard way what happens when you mess with Texans.
The characters are very believable, and Ibarra describes the area quite well. I'm being vague because I hate giving away too much when it comes to zombie novels.
The ending is mind-blowing. Still the best revenge scene since The Count of Monte Cristo (even after all these years).