Good series by author Tom Abrahams (The Traveler series) you might want to check out as the action is centered around Eastland County, Abilene, Lubbock and the Palo Duro Canyon. The thesis is a dystopian future after a disease epidemic has wiped out much of the population of the world. I read theso on Kindle for cheap during the Christmas holidays
https://www.amazon.com/Traveler-Post-Apocalyptic-Dystopian-Adventure-Books-ebook/dp/B0719HWD4Y/ref=sr_1_1?s=digital-text&ie=UTF8&qid=1548460117&sr=1-1&keywords=the+traveler+series
https://www.amazon.com/Traveler-Post-Apocalyptic-Dystopian-Adventure-Books-ebook/dp/B0719HWD4Y/ref=sr_1_1?s=digital-text&ie=UTF8&qid=1548460117&sr=1-1&keywords=the+traveler+series