The Emissary

"Arriving home after a harrowing tour of duty on a hostile alien world, USC Sergeant Matt Reeves has just learned the enemy–an insidious humanoid species known as the Wraith–may be preparing to attack Earth again. With much of Earth still in ruins, and its military forces stretched beyond capacity fighting an interstellar war, there is no way mankind could survive another invasion. Teetering on the brink of defeat, the United Space Command is desperate to find some form of leverage. Enter The Emissary Program." ― Abridged from this book's product page on Amazon's website as of 2019-09-03.