Blind people cannot read ordinary books so a man named Louis Braille invented a system.The system was raised dots instead of letters.The dots helped people if they couldn't read.They would touch the dots and then the blind person would know what letter it is.
Hundreds of years ago the first book made with raised dots was printed in France. Now they sell them all over the world.
Today you can borrow braille books from the library. Now blind people can also read books so they can get wonderful knowledge and enjoyments from reading