"Twelfth Hour" by Ada Leverson is a book about the complex relationships between people during the First World War. The main character, Marilyn, finds herself in a situation where her fate is determined not only by her own decisions, but also by the dangers and dirty secrets lurking around. In this book, the author combines the complexity and drama of frontline life with the inner world of the heroine, making each chapter an exciting path of discovery. "Twelfth Hour" is not only a historical novel, but also an excellent example of literary skill and the ability to deeply study human nature in wartime conditions.