After camping in Rocky Mountain National Park, Jake and his friends travel to the Great Sand Dunes in southern Colorado. Exploring the heart of the dunes, they stumble upon something both unexpected and dangerous. Through more twists and turns, Jake's friendships and integrity are tested by choices that will demand smarts and courage. The mystery unfolds as Jake, Amber, and Wes learn about survival skills, natural history, integrity, character, and...

In the riveting second installment of the National Park Mystery Series, archaeologist Chuck Bender finds himself and his young wife and stepdaughters in the crosshairs of an unknown killer when he defends his brother-in-law from false accusations of murder in the brutal slaying of a resort worker in Rocky Mountain National Park.

A famed sandstone arch in Utah's Arches National Park collapses and takes a woman atop it to her death, ensnaring archaeologist Chuck Bender and his family in lethal questions of environmental monkeywrenching and political intrigue. As more deaths follow, Chuck and his wife Janelle race to uncover the killer even as they become murder targets themselves.

"When Janelle Ortega's cousin from Mexico is found brutally murdered at a remote petroglyph site in Saguaro National Park, she and her husband, archaeologist Chuck Bender, are drawn deep into a threatening web of hostility and deceit stretching south across the US-Mexico border and back in time a thousand years, to when the Hohokam people thrived in the Sonoran Desert. Evoking the stark, cactus-studded beauty of Saguaro National Park in southern Arizona,...

While camping in Zion National Park, Jake Evans and his friends uncover a new set of cryptic clues hidden in his grandfather's scrapbook. Battling unpredictable weather, unforeseen challenges, and an elusive adversary, the three friends are forced to rely on their problem-solving skills, the power of their growing friendship, and the courage to do the right thing.--Publisher's description.

In a remote corner of Alaska, Investigative Services Bureau agent Felicity Harland squares off against a mysterious cult leader with potentially deadly motives when she joins with her partner, Hux, to investigate the deaths of a young couple in Gates of the Arctic National Park.

"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"--

Jake, Amber, and Wes encounter new dangers and find their friendship tested as they follow the clues Jake's grandfather hid away in the old scrapbook. The stakes are higher, and the history goes deeper as the three kids put their heads together to solve a puzzle that is perhaps hundreds of years in the making.--Publisher description.

In the ninth book in Graham's National Park Mystery Series, an archaeologist must stop a century-old crime to save his daughter. When archaeologist Chuck Bender makes a stunning discovery of a century-old crime, he believes it may be related to a series of deadly accidents plaguing the Whitney to Death 150, the world's toughest ultra trail-running race. While Chuck's teenage stepdaughter Carmelita races to win the competition, Chuck races to uncover...

Twelve-year-old Jack, his younger sister, and the family's teenage foster child Troy go to Yellowstone National Park, where Jack's mother, a wildlife veterinarian, is investigating the report that wolves reintroduced to the park have killed a dog there.