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...

Park Ranger Anna Pigeon moves to Mississippi to accept a promotion, but she begins to think she has made a big mistake when the body of a young girl is found near an overgrown country cemetery, and her attempts to find answers are met with silence, hostility, and violence.

Ranger Anna Pigeon may be happily married, but she is not willing to pass up an opportunity to advance her career. Rocky Mountain National Park is her new destination, and no sooner does she set foot in the park than she finds herself smack in the middle of a bizarre mystery: two young teen girls who have been missing for weeks reappear.

Anna Pigeon returns to the West, where she is sent on a training assignment to study grizzly bears in Waterton/Glacier National Peace Park. But back in her beloved mountains, Anna fails to experience the spiritual renewal she expected. Instead, nature seems to have become twisted, carrying a malevolence almost human in its focus.

For twelve years, Andrea Lankford lived in the biggest, most impressive national parks in the world, working a job she loved. She chaperoned baby sea turtles on their journey to sea. She pursued bad guys on her galloping patrol horse. She jumped into rescue helicopters bound for the heart of the Grand Canyon. She won arguments with bears. She slept with a few too many rattlesnakes. Hell yeah, it was the best job in the world! Fortunately, Andrea survived...

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.

Park ranger Anna Pigeon, summoned to the side of a friend who was injured while exploring Lechugilla Cavern, learns that her mission is much more dangerous than she had imagined when Frieda, suffering from leg and head injuries, confides that someone tried to kill her.