The Uninvited Guest: A Play for Girls in Two Acts, by Elizabeth F. Guptill, tells the story of a young girl named Lily who hints at a beautiful summer day, but her joy is interrupted by a mysterious apparition. The script of the play reveals the themes of friendship, mutual understanding and overcoming obstacles, and also demonstrates the importance of believing in true values in life. Readers will have the opportunity to observe the development of the main character in the pictures of children's emotions and high moral standards. The author has successfully combined a sharp plot with light humor, which makes this play fascinating and at the same time educational for readers of all age categories.