C.J. Box's latest thriller, The Bitterroots, follows a family that redefines the word dysfunctional: the Kleinsassers, longtime ranchers and influential denizens of remote Lochsa County, Montana. Private investigator Cassie Dewell, on retainer with a local law office, has been tasked with the defense investigation of family black sheep Blake Kleinsasser, who has been credibly accused of the rape of his 15-year-old niece. It's pretty much inevitable that this investigation will not end well, as there is quite a bit of enmity among the family members, and no resolution to the case will be satisfying to all the players. The evidence is compelling, with a positive ID from a DNA sample and Blake's statement that he cannot remember any of the events of the night in question. Yet when Cassie ramps up the investigation, she is stymied at every turn by the Kleinsasser family, to the point of being jailed on trumped-up charges. Clearly someone is invested in derailing the investigation and seeing Blake put away for a very long time, irrespective of his guilt. Box is in top form here, gilding his reputation for finely crafted suspense novels of the New West—a place you wouldn't necessarily want to live but that is endlessly intriguing to read about.

In Box's fourth "Cassie Dewell" mystery (after Paradise Valley), Cassie is working as a PI in Helena, MT, conducting investigations for insurance companies and car dealerships, which feels like a breath of fresh air after her previous job in law enforcement. But then an old friend calls in a debt, and Cassie leaves the comfort of her new business to look into the circumstances surrounding the arrest of a member of an influential family in a small, rural community. As she heads into the Bitterroot mountains, where a fire is raging, that fresh air disappears both literally and metaphorically. The family of the accused is the worst kind of dysfunctional, and there's a trucker who seems bent on killing Cassie and her family, harkening back to her stressful days chasing a serial rapist and murdering trucker. After a slow start filling in Cassie's history, Box shifts into high gear, pulling the plotlines together while writing lyrically of the Western landscape. VERDICT Box gives a scathing look at the perverted nature of a backwoods isolationist family, at the same time providing a strong female protagonist. This will appeal to readers who enjoy works by Craig Johnson, Paul Doiron, Brian Panowich, and Nevada Barr. [See Prepub Alert, 2/4/19.]—Sharon Mensing, Phoenix

A friend asks newbie PI Cassie Dewell to help exonerate a man accused of assaulting a girl from an influential family, and Cassie soon learns that the hidden backstory looms as big as Montana's sky.

In this outstanding novel from Edgar winner Box, erstwhile police officer Cassie Dewell, last seen in 2017's Paradise Valley, has rebooted her career and become a PI in Montana. A single mother, Cassie sometimes has to take work where she finds it, but her alarm bells go off when attorney Rachel Mitchell offers her a dubious assignment: investigating the arrest of millionaire Blake Kleinsasser, who has been charged with raping his 15-year-old niece, Franny Porché. The black sheep of his wealthy ranching family, Blake admits he was too drunk that night to remember whether he attacked Franny. Thus, gathering evidence that could clear Blake will be a huge challenge. How huge Cassie only gradually learns, as she canvasses the law enforcement of Lochsa County as well as the Kleinsasser family members. Local resistance soon escalates into serious peril when Cassie is arrested and thrown in jail on a trumped-up charge. Vividly etched characters and a realistic plot lift this outing, and the well-done Montana setting is a plus. Box remains at the top of his game. 300,000-copy announced first printing; author tour. Agent: Ann Rittenberg, Ann Rittenberg Literary (Aug.)