It's a mark of quality when a given narrative (game or no) largely trusts the reader to intuit details about the setting through experiencing the story itself. Bookwalker is one of the foremost games in memory that does this really well amidst some really intriguing premises contained within the books you 'jump' into and point-and-click adventure through. It's really a nice little package, Bookwalker, with an arching story that is melancholic but not too bleak.