lighting issues

ok… i am making a book shelf… and when i render the picture… it is really dark on one side… how do i make it so that it isn’t dark any more?

In Blender, without any lamp you’ll only see black objects and the background. You’ll need to add a lamp aimed at the dark side of your bookshelf. You can add one by pressing the SPACE BAR >> Add >> Lamp. I’d advise a normal lamp to begin with.