Bishop's Song (Holding Their Own Book 6);

Box six of bestselling author Joe Nobody’s saga continues the adventures of Bishop and Terri as the communities of the Alliance strive to improve the quality of life for all. But the obstacles are many.
War looms on the horizon as treachery threatens to destroy everything they’ve worked so hard to build. Bishop must accomplish the most difficult mission of his life, navigating a post-apocalyptic world that threatens danger at every step, testing the will of even the strongest of men.