Sometimes I come across stories that are so well-written but also so safe and undemanding in their tropes and structures that I'm simultaneously enchanted and bored. Three is one such story. Immediately recognizable to anyone with even a passing knowledge of post-apocalyptic stories, it nonetheless has all the hallmarks of an exciting, well-paced, thoroughly plotted novel. Jay Posey has a talent for narrative, both in the sense of the twists and turns that keep you…