The Nature of Change

Andy Voitenko notices things that others don't. Nothing paranormal, he just sees the laws of physics in action. He's always been socially awkward. And that makes him a target for a group of scientists who want the smart ones. He never expected wings, never expected scales, and never expected aliens that want to kill him and everyone he knows.
Terry Alfred Lawrence is just a normal navy officer, until he's presented with an offer he can't refuse - a place in a bunker deep underneath the Canadian Shield to survive a coming invasion. He's chosen half because he knows how to lead, and half because he knows how to learn. He never expected dissent, never expected oligarchy, and never expected the difficulties of keeping a human settlement in a hostile environment running.
When their paths cross, and when the alien threat comes for another shot at Earth, they will shape the future in ways nobody could have expected.

The Nature of Change was inspired by (and is set in the universe of) Upon Wings of Change, by @CrystalScherer. And thanks to @wingedalpha for her work on the cover art.