""The Door Opens And Our Mark Twain"" by Helen Keller is a memoir that chronicles the author's personal relationship with the famous American author and humorist, Mark Twain. Keller, who was deaf and blind from a young age, met Twain when she was just 14 years old and he quickly became her mentor and friend. The book is a collection of letters, essays, and personal anecdotes that provide insight into the unique bond between these two iconic figures...