The book "A Step on the Stairs" by the famous American writer Anna Catherine Green is an exciting detective story that twists until the very end. The main character, a young woman named Rachel, witnesses strange events happening in her own house. She decides to make an effort to solve this mystery, but the closer she gets to the truth, the more her life is in danger. Readers will not be able to tear themselves away from each page of this book, deepening their interest in solving the mystery hidden in the staircase moment. "A step on the stairs" is an exciting and dizzying journey into the world of crime and intrigue, where every step could be the last.