FBI special agent Mercy Kilpatrick has been waiting her whole life for disaster to strike. A prepper since childhood, Mercy grew up living off the land — and off the grid — in rural Eagle’s Nest, Oregon. Until a shocking tragedy tore her family apart and forced her to leave home. Now a predator known as the cave man is targeting the survivalists in her hometown, murdering them in their homes, stealing huge numbers of weapons, and creating federal suspicion of a possible domestic terrorism event.

There are three rules Brooke Sullivan must follow as a new nurse practitioner at a men’s maximum-security prison: 1) Treat all prisoners with respect. 2) Never reveal any personal information. 3) Never EVER become too friendly with the inmates. But none of the staff at the prison knows Brooke has already broken the rules. Nobody knows about her intimate connection to Shane Nelson, one of the penitentiary’s most notorious and dangerous inmates.

Trauma victims are not new to medical examiner Faith McIntyre, but this one is different. The unconscious woman clinging to life after a hit and run is FBI agent Macy Crow. What the woman from Quantico was doing in a dark alley after midnight is just one mystery. The other is more unsettling: Macy is Faith’s mirror image—the twin sister she never knew she had.

Six days ago, astronaut Mark Watney became one of the first people to walk on Mars. Now, he's sure he'll be the first person to die there. After a dust storm nearly kills him and forces his crew to evacuate while thinking him dead, Mark finds himself stranded and completely alone with no way to even signal Earth that he’s alive - and even if he could get word out, his supplies would be gone long before a rescue could arrive. But Mark isn't ready to give up yet.

In this gripping stand-alone from bestselling author Mary Burton, an FBI agent must catch a copycat killer. The only difference this time: she's the final victim.