Louis Braille certainly wasn't your average teenager. Blind from the age of four, he was only fifteen when in 1824 he invented a reading system that converted printed words into columns of raised dots. Through touch, Braille opened the world of books to the sightless, and almost two hundred years later, no one has ever improved upon his simple, brilliant idea.
Margaret Frith is the author of numerous children’s books, including several titles in the Who Was? series, such as Who Was Thomas Alva Edison?, Who Was Louis Braille?, Who Was Franklin Roosevelt? and Who Was Woodrow Wilson? She lives in New York City.