Wayne J. Lutz 
When Galaxies Collide [EPUB ebook] 

When our Milky Way merges with the Andromeda Galaxy in 4.75 billion years, Earth will be facing even bigger problems than a cosmic collision. Two parallel worlds confront an uncertain future, while an astrophilosopher and a modern shaman struggle with decisions that will establish the fate of intelligent beings throughout the colliding spiral arms. Worlds separated by thousands of light-years are suddenly thrust together in challenges humans have never imagined.