The Helen Keller Story by Catherine Owens Pearce is a good selection if you want to know about the life of Helen Keller. In 6th grade, I read the book for a biography/atuobiography project. It had, if I recall, at least 200 pages. There was not a lot of hard words in the book if you want to rent it for you child. I got a A on the project from the notes the book gave me. If you want to rent the book for a child, or just to read, I would recommend it. Happy reading:)