The document summarizes the history and evolution of books from pre-historic times to modern digital books. It describes how early humans wrote on cave walls and stones before the Ancient Egyptians started writing on papyrus. During the Middle Ages, monks spent their days copying books by hand. Johannes Gutenberg later invented the printing press, which allowed books to be mass produced. Now books can be read digitally on devices without paper through e-books. The summary traces the development of writing mediums from prehistoric times to modern technology.