How do blind people read books?

Braille, or Braille and Braille, is a kind of writing designed for the blind and perceived by touch. It consists of braille board, braille machine, braille printer, etc. , make different bump combinations on paper. Usually, Braille in each square consists of six dots. It was created by French blind Louis Blair in 1824, so Braille is called "Braille" internationally.