Deepa Anappara’s debut novel Djinn Patrol on the Purple Line is an exuberant and captivating child’s-eye depiction of hand-to-mouth living in a sprawling, determinedly self-sustaining slum in an unnamed Indian city. Nine-year-old narrator Jai is a fan of reality cop shows beamed into his family’s one-room shack in a crowded basti surrounded by the high-rise...