About the book: 2006 / Many years ago, Tinker's father, a great mathematician and inventor, created a model of hyperphase gates that allow you to move between worlds. However, his invention was not used by those for whom it was intended. The gates were opened, and since then the American city of Pittsburgh has constantly, with the exception of only one day a year, been beyond reality - on the planet Elfdom. Thus, close contact arose between people and elves - immortal humanoid creatures who once chose magic as a strategy for their own improvement..