Earth colors

"Asked to investigate a famed painting that may be a counterfeit, forensic geologist Em Hansen discovers that she is on the trail of a murderer when her client begins to suffer the effects of poisoning."
"Asked to investigate a famed painting that may be a counterfeit, forensic geologist Em Hansen undertakes a journey through several states and discovers that she is on the trail of a murderer when her client begins to suffer the effects of poisoning."@en
"Em Hansen, the popular heroine at the center of Sarah Andrews's unique geology mystery series, has landed a new job, although an unusual one: a client affiliated with a museum wants Em to investigate a painting by the famed western painter Frederick Remington. The client believes it's a fake, but Em must explore the painting's provenance to find out. The project takes her through Wyoming, Utah, Washington DC and Pennsylvania, and halfway through the trip Em finds she's also chasing a murderer: someone seems to be slowly poisoning her client's family. Before long, her innocent research project has taken a sinister twist, and it's up to Em to find out what's going on in time to save her own skin. All in all, Earth Colors is another smart, inventive mystery from Sarah Andrews, a fan favorite."@en
"A Mystery featuring forensic geologist Em Hansen."@en