Choose a public domain book from http://www.gutenberg.org/ or some other text source.for example: Flatlands: http://www.gutenberg.org/etext/97CreatorAbbott, Edwin Abbott, 1838-1926TitleFlatland: a romance of many dimensionsLanguageEnglishDownload the txt file.
Take one of the many beautiful books available at project Gutenberg and convert it into a wall sized readable book. Makes great gifts for the literary types in your life.
This is the complete text of Flatlands, and how to generate and print it, at 60 x 42 inches. That's huge!
Take a look at the PDF.