This second novel in the Loop Trilogy continues the saga of teens battling a controlling, corrupt world government in a dystopian future. In the opening scenes of this second installment, Luka is again the first-person narrator, reminding readers of key events from the series starter. It's not long, however, before readers are questioning reality along with him. Oliver carries on with what he did best in The Loop (2020)--writing about daring escapes, taut twists and turns, characters making tough decisions, and, of course, creepy tunnels with just as much intensity as before. First up is an escape from the Block, an energy-harvesting prison even worse than the Loop that leaves batteries like Luka in periods of paralysis. Regrouping with some of his ethnically diverse rebel friends, the brown-skinned teen continues his mission to take down Happy, the government's operating system. Rescuing lost friends, avoiding Mosquito drones (reminiscent of the Hunger Games' tracker jackers), and confronting the archnemesis who's still bent on killing him, Luka's course is, once again, nonstop adventure. This time Oliver interjects light humor with an old children's toy--turned--scrambler drone and offers another side of AI technology. While some second novels dip or stall, this volume aptly does its job, building background knowledge for the series, creating more tension, and setting up a riveting cliffhanger for the series conclusion. Readers will be left begging for the final installment. (Dystopian. 14-18) Copyright (c) Kirkus Reviews, used with permission.