Books with author Lise Caldwell

In a world where people who understand electricity are mocked as "Quantums," Lilly and Tristan are trying to find out as much as they can about computers, robots, and their missing parents. Raised by their grandmother with her own secret knowledge of technology, Lilly is certain that their parents somehow survived the purge of computer experts. Tristan thinks she's dreaming. The cousins aren't sure who they can trust, since even at school, there are those who want to rid the world of the last remaining traces of technology. But when they find their school under attack by forces led by the same man who made their parents disappear, Tristan knows he has to do all he can to help Lilly with her quest.