"While teaching on a trip to the Grand Canyon, Frankie MacFarlane is attacked and tries to escape the canyons, eventually up again ecoterrorist wannabes trying to destroy one of the exits"--

"Now reunited, Frankie MacFarlane and Philo Dain attempt to recover the Dain coin collection stolen by Philo's murdered aunt. As they follow the trail, Frankie and Philo unearth secrets from Philo's past and discover a treasure hidden from the world for nearly two hundred years"--Provided by publisher.

If nature could invent intelligence of our scale in a blink of geologic time, who's to say it hasn't been done before... A routine dig in Kazakhstan takes a radical turn for thirty-two-year-old anthropologist Claire Knowland when a stranger turns up at the site with a bizarre find from a remote section of the desolate Kazakh Steppe. Her initial skepticism of this mysterious discovery gives way to a realization that the find will shake the very foundations...

"This is going to be Dylan’s big break. Her friend Clay, a geology student, has discovered an untouched cliff face in the Kentucky wilderness, and she is going to be the first person to climb it. Together with Clay, his research assistant Sylvia, and Dylan’s boyfriend Luke, she is going to document her achievement on Instagram and finally cement her place as the next rising star in rock climbing. Seven months later, three bodies are discovered...

"He wasn't civilized or tame. He had his own code and he lived by it. Monk. Bounty hunter. Vampire slayer. Andre Boroi has spent centuries battling the undead, holding out against the dark with honor. But now, gravely wounded by master vampire Costin Popescu, Andre will be easy to track--his spilled blood marking the killing trail for Popescu and his hungry band of underlings. Andre's only chance is to disappear into the gray mist of the Carpathians....

A white water trip through the Grand Canyon goes off-course when Em Hansen's husband is accused of murdering a fellow rafter.

Assigned to assist the Salt Lake City police in the investigation of the murder of Afton McWain, a controversial colleague whose body turns up in a gravel quarry, forensic geologist Em Hansen confronts the results of the victim's turbulent personal life.

A scientist, his nephew, and a mountain guide discover a fantastic, dangerous world at the center of the Earth and must find a way back to the surface before it is too late.

Heading for Antarctica to study glaciology with her mentor, Dr. Emmett Vanderzee, Valena Walker finds herself thrust into the role of amateur sleuth when Vanderzee is arrested for the killing of a reporter, who died in Antarctica the previous winter.