Title: Be first in the universe
Description: While staying with their hippie grandparents, ten-year-old twins, Tod and Tessa, discover an unusual shop at the nearby mall, where they find a lie-detecting electronic pet, a Do-Right machine, and other alien gadgets which help them foil their nemeses, the evil Gneiss twins.
Subjects: Fiction, Science fiction, Twins, Extraterrestrial beings in fiction, Extraterrestrial beings, Twins in fiction, Children's fiction