And who here doesn't love Marines in the future whipping a little ass? These three books are about the United States Marine Corps fighting in Space and discovering alien things on Mars, the Moon, and eventually Europa. Sure, a little far-fetched, but a whopping good read altogether. The first book takes place in 2040, where humanity has a few bases on Mars. Well, at Cydonia (google Cydonia Face) they have discovered some alien stuff. So they send out archeologist David Alexander along with the 30-man Marine Mars Expeditionary Force as protection of 'American Interests'. Mostly because the UN is hot shit on the ball with keeping this stuff under wraps. Something or other about it spelling out the end of human civilization or some such nonsense. Anyways, you'll have to read it for yourself, i dont want to give it all away. The second book is 2 years later, with the USA, Russia, and Japan fighting the UN across the planet and across the solar system. On the Moon, some MORE alien stuff is discovered, so they send Dr. Alexander again, along with the 1st Marine Space Expeditionary Force, to blow some UN spacefarers to bits and secure a base at Fra Mauro. A couple hundred pages and a couple hundred green beanie POWs later, and the Marines hit the other side of the moon. Not gonna finish that one up for you either! The last book is about some gigantic alien sentient creature on the Jovian moon of Europa, a frozen ice ball with a 12 kilometer across city/spaceship/intelligence/WHATEVER at it's core. Anyways, it starts of in 2067, when the Chinese thought it would be hilarious to destroy 2 American Anti-Matter cruisers in deep space, and then land 400 screamin commies on the planet to attack the 81 surviving Marines on the surface of the planetoid. Chosin all over again.
Aaanyways, i just thought you guys would like to hear about them, since they're sort of similar to the Starfist series, what with the Marines of the future and what not. Plus they're well written, action packed, and leave you with quite a few philosophical questions that will hammer your skull to bits trying to get out.