This is a website about Johannes Gutenberg. It just talks about his life and the background story of his life changing invention of the printing press.
With the new invention, 42 lines could be printed at once, dramatically reducing the labour and cost of creating books (which previously had been handwritten manuscripts).
The most influential book published by Gutenberg was the Gutenberg Bible in 1455
This website is really helpful because it walks you through the many inventions of the printing press. It's basically a timeline of all the different types of printing systems that were invented.