With Alien: Enemy Of My Enemy (paperback, Kindle, audiobook), writer Mary SanGiovanni isn’t just putting her spin on this sci-fi series, she’s also concluding a loose trilogy that started with David Barnett’s Alien: Colony War and continued in Philippa Ballantine’s Alien: Inferno’s Fall. In the following email interview, SanGiovanni discusses what inspired and influenced her sci-fi horror thriller, as well as how it connects, and disconnects, from the other two books.