The Last Colony

Retired from his fighting days, John Perry is now village ombudsman for a human colony on distant Huckleberry. With his wife, former Special Forces warrior Jane Sagan, he farms several acres, adjudicates local disputes, and enjoys watching his adopted daughter grow up.
That is, until his and Jane's past reaches out to bring them back into the game - as leaders of a new human colony, to be peopled by settlers from all the major human worlds, for a deep political purpose that will put Perry and Sagan back in the thick of interstellar politics, betrayal, and war.
The highly-anticipated conclusion to John Scalzi's SF trilogy begun with Old Man's War and The Ghost Brigades concludes with The Last Colony

John Scalzi is a prolific journalist, columnist, and non-fiction writer whose books include The Rough Guide to the Universe and The Book of the Dumb. His web journal Whatever is one of the longest-established and most widely-read weblogs on the net. His acclaimed debut SF novel Old Man's War was published by Tor in 2005
William Dufris has been nominated six times as a finalist for the APA's prestigious Audie Awards. He garnered eighteen Golden Earphones Awards through AudioFile magazine, which honored him as one of "The Best Voices At The End Of The Century." Of his work, AudioFile magazine said, "William Dufris commands a dazzling array of voices that bring to life the dozens of audiobooks he's narrated." His other narrations include Newt Gingrich and William R. Forstchen, Ph.D.'s Days of Infamy and Pearl Harbor, Tom Perrota's Nine Inches, and John Scalzi's The Human Division.