Juston Seyfert's life is changing faster than he could have ever dreamed. But it's not just acne and algebra tests that this high school sophomore has to cope with...Juston has a secret bigger than anyone in his hometown of Antigo, Wisconsin, could possibly have imagined: He's discovered the battel-ravaged remains of a Sentinel - a gigantic mutant-hunting robot built by the government - in his family's junkyard and has used his prodigious technical skills to put the mechanical marauder back together Collects SENTINEL 6-12.