She was real, but was probably retarded, and her "interpreters" made up their own speeches. She worked closely with Anne Sullivan for most of her life, and when Anne died, I don't believe Hellen published another book, though she continues writing letters.

The real issue is that there's never been another Hellen Keller, before or since. All of the "modern Hellen Keller's" have been people who lost both senses late in childhood, which isn't the same thing. 

 Literally sounds like gas chamber rollercausters. 

 need to get that ai image magic going on getting Hellen Keller and Anne Frank riding on the holocaust rollercoaster