"The One Who Was Once a Demon" is an exciting novel written by the famous writer Serhiy Shcherbak. This book tells the story of an ordinary guy who finds himself in unusual circumstances and discovers mysterious powers. He stands up for the weak and fights against evil, bearing an inner struggle. The author mesmerizes the reader with a tense plot, unexpected twists and moral dilemmas of the main character. This novel will captivate all fans of fantasy and amaze with its unexpectedness.