Alex always knew that something very unusual could be found in the attic of his grandmother's house! No wonder he was forbidden to go there. But he never thought that he would find the secret room of his grandfather, a professor who mysteriously disappeared several years ago. Here the boy found not only a bunch of ancient artifacts, but also his grandfather’s diary. It turned out that Professor Aurelius studied... magic! He desperately wanted to unravel the mystery of the magic ball - a magical artifact with enormous power. And now Alex must continue his work! After all, this is the only way to find grandfather. But what dangers await him along this path? Bestseller of the prestigious Spiegel magazine.