Title: Marco's millions
Description: Twelve-year-old Marco's love for travel and for his younger sister Lilly, who has psychic powers, leads him to journey to other universes, gaining the ability to go wherever he wishes without growing old.
Subjects: Science fiction, Human-alien encounters, Psychic ability, Brothers and sisters, Space and time, Fiction, Children's fiction, Space and time, fiction, Siblings, fiction, Extraterrestrial beings, fiction