No Mercy — Lori Armstrong

Mercy Gunderson is a straight shooter with a hard edge. On medical leave from the army, she returns home to South Dakota, which isn't much safer for her than Iraq. Arriving just after the death of her father, it is up to Mercy to decide what to do with the family ranch and try to deal with her irresponsible sister and nephew. Feeling guilty that she didn't make it home soon enough to see her father one last time, Mercy is suddenly pulled into the local community when the body of an Indian boy is found on her land. But nobody seems to be doing anything about it, especially not the local law enforcement.

When tragedy strikes again, Mercy is ready to throw all her energy into her own investigation, and she's out for revenge. As she digs up the truth behind the shocking crimes, Mercy uncovers dark and dangerous secrets and must race to stop a killer before everything she's fought for is destroyed forever.