River Run

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 bag of pebbles caught by the bow line. Following that clue, the geologists uncover a hellish scheme. Not only are the rafters in peril, but the river itself is under attack.The race to stop it takes Cassie and Walter deep into the canyon, and onto the mighty river, putting their own survival at stake. _____All books in the series are complete novels, and can be enjoyed in any order. Toni Dwiggins is an award-winning and bestselling author. She takes forensic mystery into thriller territory, bringing her characters from the lab to outdoor adventure. She has hiked the same trails, skied the same mountains, run the same river, and kayaked the same sea as her characters -- but she doesn't get into nearly the trouble that they do.