Sergei Lukyanenko (as his name appears on books and films in U.S. markets) is a science-fiction and fantasy author, writing in Russian, and is arguably the most popular contemporary Russian sci-fi writer. His works often feature intense action-packed plots, interwoven with the moral dilemma of keeping one's humanity while being strong.
Lukyanenko is a prolific writer, releasing usually 1-2 books per year, as well as a number of a critical articles and short stories. Recently his works have been adapted into film productions, for which he wrote the screenplays. He lives in Moscow with his wife Sonia and two sons, Artemiy and Danil, keeps mice as pets and enjoys cooking.
This is essentially Battle Royale interpreted by Sergei Lukyanenko of Night Watch fame. It features all the tropes you would expect, while holding up a solid mystery plot-suspence.
Первое -- такая слабо написанная смесь из "повелителя мух" и атмосферы советских детских лагерей. А второе просто проба пера. В общем для среднего школьного возраста пойдёт.