"Leon" is a book for both teenagers and very mature, worldly people. This is a paradoxical family story, a strange love story, a coming-of-age tale that gives hope. The Dyachenko couple were born in Kyiv, co-authors, screenwriters, winners of more than a hundred literary awards. For the last ten years they have lived in the USA, writing in Russian in the genres of modern science fiction , fantasy and fairy tales. Their books have been translated and published in America, Great Britain, Germany, France, Italy, Spain, Brazil, China and other countries. After the death of Sergei Dyachenko, her husband, friend and co-author, in 2022, Marina continues their common cause, as she promised Sergei .