Centaur Sol (Eternal Sol Book 2) by Morgan Landsbury

http://www.amazon.com/Centaur-Sol-Eternal-Book-ebook/dp/B01AIK7OJQ

Free 2/16/2016 - 2/20/2016!

Imagine you're entire civilization is under threat and its your job to seek out and destroy the source of that threat. You discover the threat is actually a mysterious child who grows into a woman almost overnight and she has a strange allure to you.  Now you're in the tough spot of choosing between your duty to save mankind and a love that transcends time and logic.  This is Tamil's story.