The book block: Books look like books (rather than brochures or reports) because the text is
confined to a
tightly - defined
area on the page called the book block, where facing pages end on the same line.
It's a huge ship, but also a
tightly contained location where you'll meet many doors and inaccessible
areas, meaning there's a lot of running to and fro through a
confined setting gathering keys and items in order to progress.