"Petrodor" is an exciting fantasy book that will transport the reader to an exciting world of magic and adventure. In the center of events is a young girl named Olga, who by the will of fate becomes the key to the great secret city of Petrodor. Going on a dangerous search for her sister, she finds herself in the middle of a war between the forces of good and evil. Readers will experience together with the heroine, feeling every step in the dark, every meeting with mysterious creatures and magical objects. "Petrodor" is a book that will not leave anyone indifferent to the beautiful world of fantasy, where good fights against evil, and the power of friendship and faith in one's own abilities turns the most difficult trials into victories.