Deserter: Kris Longknife, Book 2 (Unabridged‪)‬

Kris Longknife had no choice about growing up rich and pampered. When she did have a choice, she joined the Marines. But now, a friend needs help halfway across the galaxy - and with a military heritage coursing through her blood, it's time for Kris Longknife to be a hero. Kris boards the next ship to Turantic, the last place her friend was seen alive. But there's more to the rescue than meets the eye.
Turantic is not only the most twisted hellhole in the galaxy, but it's also under quarantine because of a deadly plague. And after a sudden, suspicious loss of communication with the outside world, Kris realizes the length some enemies will go to for a life-threatening bait-and-trap. But she is willing to go even further - and deeper into Turantic's secrets - to survive.