Lark is a teenage girl; Termite is the nickname of her young half brother ''a kid who can't walk and doesn't talk.'' Lark & Termite, the story of how the two came to be living with their aunt in West Virginia in the summer of 1959 is, in the hands of fever-dreamy storyteller Jayne Anne Phillips (MotherKind, Machine Dreams), an unnerving saga that finds its way back to the agonies of an American soldier trapped in a cave in the Korean War. Phillips returns to familiar preoccupations siblings tested by adversity, war abroad that shakes life at home, the power of sex, the West Virginia of her birth but she makes her tough turf new again. A–

