This is a standalone post-apocalyptic, alien invasion, character driven story. The characters are well developed and lifekike with realistic actions and emotions. The story is told from the point of view of the two main characters as they make their harrowing journey. Their inner dialogue reflects their self-introspection, rambling thoughts, musings, weaknesses, anxieties, imagination, fears and emotions – things they often do not outwardly reveal. This is a complete story from a mysterious beginning to a satisfying conclusion. The narration by Jeffrey Kafer and Heather Costa was captivatingly spot-on. I was given a free copy of this audiobook at my request and voluntarily leave this unbiased review.