Johnson, Craig. The Serpent’s Tooth(Viking $26.95 June 12). In another amazing mix of characters and crimes, Johnson adds rare books. Love it. It’s a case that begins with a whippet-like teenage boy creating havoc. It’s hard for Absaroka County Sheriff Walt Longmire to hold on to him. With some work and some travel to a more remote corner of his turf, not to mention South Dakota, Walt determines the boy is one of the “lost,” youths of polygamous families who get the boot so older males can have multiple women. But it’s more than that—hint, follow the money—and a challenge that involves Walt, Vic, the Cheyenne Nation, another Sheriff, and another slippery male who claims to be 200 years old…. The title gives you a hint as to part of what drives the plot.