Three friends-- a former SWAT-team sniper turned park ranger, an FBI agent, and a crime scene analyst-- reunite and join with a beautiful forensic anthropologist to identify skeletal remains uncovered near Little Round Top in Gettysburg National Military Park. Their investigation causes them to become targets themselves.

"Anna Pigeon, in her career as a National Park Service Ranger, has had to deal with all manner of crimes and misdemeanors, but cyber-bullying and stalking is a new one. The target is Elizabeth, the adopted teenage daughter of her friend Heath Jarrod. Elizabeth is driven to despair by the disgusting rumors spreading online and bullying texts. Until, one day, Heath finds her daughter Elizabeth in the midst of an unsuccessful suicide attempt. And then...

"Brought in as chief investigator when a party of campers go missing, 32-year-old Felicity Harland must place her trust in a Navy SEAL turned park ranger when the investigation takes them from the wilderness to the streets of Los Angeles where the grisly truth comes to light"-- Sequoia National Park. A park ranger discovers an abandoned campsite with an empty tent and high-end technical gear scattered on the shores of an alpine lake. Former FBI agent...

Visiting an isolated Lake Superior isle to study wolf behavior, ranger Anna Pigeon joins a scientific group that subsequently discovers unusual DNA evidence suggesting that a giant and dangerous wolf hybrid has been introduced by an unknown source.