Once upon a time, this world was one.... There were big cities and powerful cars, and besides, its inhabitants had magic. But as a result of the cataclysm, he was divided into two: the World of Magic, whose inhabitants do not understand anything in technology, and the World of Machines. These worlds are near, but the boundary between them is insurmountable for all except the great magician Mora .. To save Paul, the son of a defeated sorcerer, from imminent death, he transports him to the World of Machines, in return for taking from there another baby named Mark .. However, the origin makes itself known .. With age, Mark is increasingly interested in cars, and Paul begins to work wonders. It is time to re-intervene the old Mora, for the very existence of both worlds is threatened... The book includes the novels "Substituted" and "Obsessed with magic" ..