Summer Westin Mystery Books in Order

When a boy disappears from a Utah campground, wildlife biologist Sam Westin fears her actions helped put him in danger. As the media blames local cougars, she joins FBI agent Chase Perez in searching for a human explanation.

While working for the National Park Service, wildlife biologist Sam Westin hears an explosion and finds a trail worker badly burned. Her questions about the fire, an old mine and illegal hunting place her in someone's way.

Sam Westin joins a marine survey in the Galapagos despite overstating her diving experience. When her partner's air supply is contaminated, she suspects sabotage and finds herself caught between conservationists, fishermen and people profiting from endangered marine life.

After two friends are murdered, Sam Westin takes over guiding their wilderness therapy expedition for troubled teenagers. Managing the group in the Cascades becomes more dangerous when signs suggest the killer may be following them.

Wildlife photographer Jade Silva vanishes after sending a photograph of a jaguar near the US-Mexico border. Sam Westin searches for her friend in terrain crowded with smugglers, vigilantes and authorities, where environmental damage compounds the danger.