Alien: Enemy of my Enemy is your standard, decent but not amazing or special Alien novel. It's 7/10 or 6,5/10, if You are Alien fan, You should have good time with it, unless You consumed too much Alien content lately and are tired of similiar things. Because in it we have rather standard affair: experiments on Xenos, mad WY scientist, new hybrid that shows up only for few pages and doesn't anything special, and some marines action. It has some good things. XX121s are deadly and hard to kill, I like how few times in the book soldiers were firing to just one Alien and it often only got slightly hurt and ran away or killed someone. I also like return of Alec Brand. This returning characters give this Universe connectivity and though Rescue was one of worst DH Comics, Alec had potential as character, and in EOME author did aome interesting things with him, depicting him as someone with slight PTSD and wanting to forget about Xenomorphs and encounters with them. He acted too unexperienced at times though. Rest of characters were fine. And the thing that I liked but also confused me was Connection to RPG. On one hand it was fun to see things from Frontier War plotline incorporated to the book, but it was also weird that book essentialy gives alternative conclusion to it and potentialy spoils it for players who are yet to play it. Also conclusion to border bombers ploy is sidelined and a little anticlamactic, but it's not enteirely this book's fault, it's rather because these whole trilogy wasn't really a coherent and connected story.