6 The Forensic Geology Series books in order

"A MUST READ for anyone wanting a mystery layered with suspicion, sibling rivalry, family dysfunction, murder, and environmental catastrophes... I couldn't put it down!" (Amazon reader)

A YOUNG MAN DISAPPEARS in the California gold country. He leaves behind a gold-flecked rock and a vial of toxic mercury. He is a… show more.

DEATH VALLEY EARNS ITS NAME when a terrorist threatens to unleash lethal radioactive toxins--in America's most fragile national park.

Forensic geologists Cassie Oldfield and Walter Shaws embark on a perilous mission to find and stop the terrorist. But this hunt pushes them to their limits. The summer desert is brutal.… show more.

"An exciting character-driven thriller in which a mountain blows up. What more could you want?" (Amazon reviewer)

NO WAY OUT -- so says the note in the pocket of the murdered mayor.

The volcano beneath her town is seething, and the fate of Mammoth Lakes now rests in the hands… show more.

A MYSTERY AT SEA plunges forensic geologists Cassie Oldfield and Walter Shaws into deadly waters.

When a boat is found deserted off the California coast, it looks to be a simple fishing accident. But there is nothing ordinary going on here. The geologists track the strange incident to an even… show more.

-- USA TODAY BESTSELLER --

THERE ARE PLENTY OF WAYS TO DIE in the Grand Canyon.

Forensic geologists Cassie Oldfield and Walter Shaws investigate one way: trouble on the canyon's Colorado River. Stranded raft. Life vests unused. Rafters missing.

The only clue to the fate of the rafters is a… show more.

DEEP BENEATH THE STREETS OF SAN FRANCISCO, a murder victim is dumped at an archaeological dig. A note pinned to his shirt warns we will bury you.

The question is, who is you?

Desperate to learn what happened--and what might happen next--investigators bring in forensic geologists Cassie Oldfield and Walter… show more.