I can't speak from knowledge regarding the Foundation series, because I haven't read the whole thing. I think I read the first book when I was in high school.
Regarding "the power to communicate with little or no vocalization, read emotions and, to some degree, thoughts" I can speak from personal experience and knowledge when I say that I know that this is possible. From my experience I do believe that the PhotoReading method is tapping into communication through thought transferral (through connecting to the energetic thought form of the book and also through connection to the thoughts of the authors of the books, and indeed others who have read the books and thought about them, further contributing to the growth and energy of this thoughtform.
For reasons of ethics and morality I will not touch upon the idea of influencing the emotions and thoughts of others directly through such methods.
I also have a very good impression of LSC and their products and courses. It is good to see companies forming that are bringing these ideas down into practical usefulness in the world.