V.I. Warshawski, like all of us, is not getting any younger. She is well past the age of dangling upside down in search of clues or doing fishtail burnouts in her V-8 Mustang to avoid getting shot, and certainly past the years when she should be treading across thin ice floes to keep a priceless artifact out of the hands of a ruthless billionaire. But in Sara Paretsky’s latest thriller, Shell Game, age seems a nonissue, as V.I.’s latest crusade leads her to engage in all these dangerous activities and more. Two cases weave in and out of the narrative: the first, a murder charge hanging over the beloved nephew of V.I.’s godmother, surgeon Lotty Herschel, involving a Syrian archaeological dig and a dissident immigrant poet on the lam from ICE; the second, the mysterious disappearance of V.I.’s niece following a Caribbean junket that turned sinister in ways that no travel brochure would suggest. As is usually the case with Paretsky’s novels, there is considerable social and political commentary, so if you are a capital-C Conservative, you might want to give some thought to how much you are willing to have your convictions challenged. Everyone else can revel in the superb pacing, the well-developed characters and the crisp dialogue from one of the most consistently excellent writers in the genre.